学进去-教育应平等而普惠
试题
类型:阅读选择
难度系数:0.65
所属科目:小学英语

Do you know the difference(不同) between our past and present life? Please let me tell you. Thirty years ago, we lived in a small house. We couldn't eat too much, because we didn't have enough food. There weren't any televisions or cars. But now we live in a tall building. We can watch TV every day. We can eat delicious(美味的) food. We can play games on the computer, too. There are many cars in our country. And our city is more and more beautiful. Our country is getting richer(富裕)and stronger (强大). I love my country. We are proud (感到骄傲的) of our country. We are happy every day.

Welcome to China. It's a great country.

1.We had ________ thirty years ago. (          )
A.a small houseB.a big houseC.too much food
2.We didn't have ________ thirty years ago. (          )
A.televisions or carsB.enough foodC.Both A and B.
3.We can ________ now. (          )
A.live in a small buildingB.watch TVC.play football on the computer
4.There ________ many tall buildings and cars in our country now. (          )
A.areB.aren'tC.weren't
5.Our country is getting ________. (          )
A.more beautifulB.richerC.more beautiful, richer and stronger
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y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

用户名称
2019-09-19
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