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20 tháng 4 2022

khoa hoc hay ta z

20 tháng 4 2022

???

30 tháng 7 2019

Đáp án là B. Due to + N: vì, do ....

12 tháng 7 2017

Đáp án là C. Ta thấy câu đã cho chia ở hiện tại đơn giản => Dùng điều kiện loại II

Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. One adaptation is to be light in color, and to reflect rather than absorb the Sun’s rays. Desert mammals also depart from the normal mammalian practice ofmaintaining a constant body temperature. Instead of trying to keep down the body temperature deep inside the body, which would involve the expenditure of water and energy, desert mammals allow their temperatures to rise to what...
Đọc tiếp

Large animals that inhabit the desert have evolved a number of adaptations for reducing the effects of extreme heat. One adaptation is to be light in color, and to reflect rather than absorb the Sun’s rays. Desert mammals also depart from the normal mammalian practice ofmaintaining a constant body temperature. Instead of trying to keep down the body temperature deep inside the body, which would involve the expenditure of water and energy, desert mammals allow their temperatures to rise to what would normally be fever height, and temperatures as high as 46 degrees Celsius have been measured in Grant’s gazelles. The overheated body then cools down during the cold desert night, and indeed the temperature may fall unusually low by dawn, as   low as 34 degrees Celsius in the camel. This is an advantage since the heat of the first few hours of daylight is absorbed in warming up the body, and an excessive buildup of heat does not begin until well into the day.

Another strategy of large desert animals is to tolerate the loss of body water to a point that would be fatal for non-adapted animals. The camel can lose up to 30 percent of its body weight as water without harm to itself, whereas human beings die after losing only 12 to 13 percent of their body weight. An equally important adaptation is the ability to replenish this water loss at one drink. Desert animals can drink prodigious volumes in a short time, and camels have been known to imbibe over 100 liters in a few minutes. A very dehydrated person, on the other hand, cannot drink enough water to rehydrate at one session, because the human stomach is not sufficiently big and because a too rapid dilution of the body fluids causes death from water intoxication. The tolerance of water loss is of obvious advantage in the desert, as animals do not have to remain near a water hole but can obtain food from grazing sparse and far-flung pastures. Desert-adapted mammals have the further ability to feed normally when extremely dehydrated, it is a common experience in people that appetite is lost even under conditions of moderate thirst.

what does the author imply about desert- adapted mammals?

a.they do not need to eat much food 

b.they can eat large quantities quickly

c.they easily lose their appetites 

d.they can travel long distances looking for food

1
13 tháng 6 2021

Chọn D nhé

21 tháng 2 2017

1. If the sea level increases, some countries (appear) .......will appear..............

2. Of all the (invent) ...INVENTIONS.......... in the world, which one do you like best.

3. Natural sources can't provide enough to support this (crow) .......CROWDED...... world.

4. Was Edinson the (invent) .......INVENTOR.......... of electric light bulb?

5. The little was (scare)........SCARED....... when crossing the road.

22 tháng 2 2017

disappear

Exercise: Choose the best answers to complete the following sentences1. “What is the groom wearing?” “He dresses in a ____.”A. light suit summer          B. light summer suit          C. suit summer light          D. summer suit light2. “When are you going to get rid of those ____ trousers?”– “Hmmm I don’t know but I like them a lot.”A. short nylon dreadful French                                      B. short dreadful French nylonC. dreadful French nylon short                       D. dreadful...
Đọc tiếp

Exercise: Choose the best answers to complete the following sentences

1. “What is the groom wearing?” “He dresses in a ____.”

A. light suit summer          B. light summer suit          C. suit summer light          D. summer suit light

2. “When are you going to get rid of those ____ trousers?”– “Hmmm I don’t know but I like them a lot.”

A. short nylon dreadful French                                      B. short dreadful French nylon

C. dreadful French nylon short                       D. dreadful short French nylon

3. There is a ____ table which was given to me by my best friends on my house warming.

A. large beautiful round wooden                  B. beautiful large round wooden

C. beautiful round large wooden                   D. wooden large round beautiful

4. Andrew has a ____- rug on the floor in her bedroom.

A. sheepskin lovely long white                                       B. long lovely white sheepskin

C. lovely long sheepskin white                                       D. lovely long white sheepskin

5. They bought me a ____ toy to congratulate me on achieving high scores in the last exam.

A. strange round orange plastic                     B. plastic orange round strange

C. strange plastic orange round                     D. strange round plastic orange

6. Charles was wearing a ____ at the Peter’s party.

A. funny wide red silk tie                                 B. red silk funny tie

C. tie red silk funny                                                            D. red funny tie silk

7. Jane lost the ____ bicycle he bought last month and his parents were very angry with him because of his carelessness.

A. Japanese beautiful new blue                     B. blue Japanese beautiful new

C. beautiful new blue Japanese                     D. beautiful Japanese blue new

8. “Can I help you, sir?” – “I’m looking for a ____ desk for my son.”

A. wooden round fashionable                                        B. round fashionable wooden

C. wooden fashionable round                                        D. fashionable round wooden

9. These ____ boots belong to Nick who is a famous fashion designer in China.

A. riding leather red Spanish                                          B. red Spanish riding leather

C. leather Spanish riding red                                           D. red Spanish leather riding

10.   He gave me a ____ box to say sorry to me for what he had done.

A. small square jewelry metal                                        B. small metal square jewelry

C. small square metal jewelry                                        D. small jewelry square metal 

1
2 tháng 6 2021

1. “What is the groom wearing?” “He dresses in a ____.”

A. light suit summer          B. light summer suit          C. suit summer light          D. summer suit light

2. “When are you going to get rid of those ____ trousers?”– “Hmmm I don’t know but I like them a lot.”

A. short nylon dreadful French                                      B. short dreadful French nylon

C. dreadful French nylon short                       D. dreadful short French nylon

3. There is a ____ table which was given to me by my best friends on my house warming.

A. large beautiful round wooden                  B. beautiful large round wooden

C. beautiful round large wooden                   D. wooden large round beautiful

4. Andrew has a ____- rug on the floor in her bedroom.

A. sheepskin lovely long white                                       B. long lovely white sheepskin

C. lovely long sheepskin white                                       D. lovely long white sheepskin

5. They bought me a ____ toy to congratulate me on achieving high scores in the last exam.

A. strange round orange plastic                     B. plastic orange round strange

C. strange plastic orange round                     D. strange round plastic orange

6. Charles was wearing a ____ at the Peter’s party.

A. funny wide red silk tie                                 B. red silk funny tie

C. tie red silk funny                                                            D. red funny tie silk

7. Jane lost the ____ bicycle he bought last month and his parents were very angry with him because of his carelessness.

A. Japanese beautiful new blue                     B. blue Japanese beautiful new

C. beautiful new blue Japanese                     D. beautiful Japanese blue new

8. “Can I help you, sir?” – “I’m looking for a ____ desk for my son.”

A. wooden round fashionable                                        B. round fashionable wooden

C. wooden fashionable round                                        D. fashionable round wooden

9. These ____ boots belong to Nick who is a famous fashion designer in China.

A. riding leather red Spanish                                          B. red Spanish riding leather

C. leather Spanish riding red                                           D. red Spanish leather riding

10.   He gave me a ____ box to say sorry to me for what he had done.

A. small square jewelry metal                                        B. small metal square jewelry

C. small square metal jewelry                                        D. small jewelry square metal 

15 tháng 10 2017

Đáp án: D

7 tháng 9 2019

Đáp án D

17 tháng 8 2019

Đáp án: D

6 tháng 3 2018

Đáp án là D.