xercise 4: Complete by changing the form of the word 1. We were waiting for the ______________ of new plans for the city’s convention center. (DEVELOP) 2. The new law should allow more ______________ people to enter the mainstream of American life. (ABLE) 3. The primary source of income for the groups was largely from donations from the group members and volunteers themselves. (DONATE) SECONDARY_GRADE 7_UNIT 3_COMMUNITY SERVICE 10 4. In our community, the responsibility for caring for the elderly upon their children? (OLD) 5. Several families living by the river were forced to leave their houses because of the ______________ (FLOODED) 6. ______________ a period of instruction given by a university or college tutor to an individual or very small group. (TUTOR) 7. The ______________ of good public transport will be essential for developing the area. (PROVIDE) 8. I am happy, indeed so ______________ of to be associated with this project. (PRIDE) 9. The hospital has asked various ______________ organizations to help raise money for the new operating theatre. (VOLUNTEER) 10.When she dies-and it will be soon-she will leave behind three ______________. (ORPHANAGE)
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How do you spend your weekends?
How much time do you spend surfing the net a day?
How do you spend your weekends?
How much time you spend surfing the net a day?
a. Does Maria have twins?
=> Yes, she does
b. Both and different Maria and her twin brother/sister?
=> Both Maria and her sister are loud and like drawing together, they are study at Super Hero Primary too.
=> Different: Naria has a curly hair with blue eyes, but Maria has a straight hair
c. Does Maria do not love her twin, why you know that?
=> No, she doesn't. Because Maria loves her sister and Naria also loves her too
Gọi x là số đo cung nhỏ AB (x > 0)
Số đo cung lớn AB là 2x
Ta có:
x + 2x = 360⁰
3x = 360⁰
x = 360⁰ : 3
x = 120⁰
⇒ ∠AOB = 120⁰
∆AOB có:
OA = OB = R
⇒ ∆AOB cân tại O
⇒ ∠OAB = ∠OBA = (180⁰ - ∠AOB) : 2
= (180⁰ - 120⁰) : 2
= 30⁰
Ta có hình vẽ sau:
Vẽ đường cao OH của ∆OAB
⇒ ∆OAH vuông tại H
⇒ cosOAH = AH : OA
⇒ AH = OA.cosOAH
= R.cos30⁰
Do OH ⊥ AB
⇒ H là trung điểm của AB
⇒ AB = 2AH
a) Gọi x là số đo cung nhỏ AB (x > 0)
Số đo cung lớn AB là 3x
Ta có:
x + 3x = 360⁰
4x = 360⁰
x = 360⁰ : 4
x = 90⁰
Vậy số đo cung nhỏ AB là 90⁰
Số đo cung lớn AB là 3.90⁰ = 270⁰
b)
Do số đo cung nhỏ AB là 90⁰ (cmt)
⇒ ∠AOB = 90⁰
⇒ ∆AOB vuông tại O
Do OH là khoảng cách từ O đến AB
⇒ OH ⊥ AB
⇒ H là trung điểm của AB
⇒ OH là đường trung tuyến ứng với cạnh huyền AB của ∆AOB vuông tại O
⇒ OH = AB : 2
Sau hai ngày thì số dầu còn lại chiếm:
\(1-\dfrac{1}{3}-\dfrac{1}{4}=1-\dfrac{7}{12}=\dfrac{5}{12}\)(tổng số dầu)
Số dầu ban đầu nhập về là:
\(65:\dfrac{5}{12}=65\times\dfrac{12}{5}=13\times12=156\left(lít\right)\)
Tỉ số giữa số bi của Hải và số bi của Tâm là:
\(\dfrac{1}{5}:\dfrac{1}{2}=\dfrac{2}{5}\)
Hiệu số phần bằng nhau là 5-2=3(phần)
Số viên bi của Tâm là:
\(36:3\times5=60\left(viên\right)\)
a: Xét ΔABC vuông tại C có \(sinB=\dfrac{AC}{AB}=\dfrac{a}{2a}=\dfrac{1}{2}\)
nên \(\widehat{B}=30^0\)
ΔABC vuông tại C
=>\(\widehat{CAB}+\widehat{CBA}=90^0\)
=>\(\widehat{CAB}=90^0-30^0=60^0\)
Exercise 4: Complete by changing the form of the word
1. We were waiting for the ___development___________ of new plans for the city’s convention center. (DEVELOP)
2. The new law should allow more ____disabled__________ people to enter the mainstream of American life. (ABLE)
3. The primary source of income for the groups was largely from donations from the group members and volunteers themselves. (DONATE)
SECONDARY_GRADE 7_UNIT 3_COMMUNITY SERVICE 10
4. In our community, the responsibility for caring for the elderly upon their children? (OLD)
(Câu 3, 4 người ta điền sẵn rồi nha, mình in đậm lại cho bạn thấy thoi)
5. Several families living by the river were forced to leave their houses because of the _____flood_________ (FLOODED)
6. ______tutorial________ is a period of instruction given by a university or college tutor to an individual or very small group. (TUTOR)
7. The ______provision________ of good public transport will be essential for developing the area. (PROVIDE)
8. I am happy, indeed so ____proud__________ of to be associated with this project. (PRIDE)
9. The hospital has asked various ___voluntary___________ organizations to help raise money for the new operating theatre. (VOLUNTEER)
10.When she dies-and it will be soon-she will leave behind three ___orphans___________. (ORPHANAGE)