It is Monday morning. The sky is blue. My friend and I are going to the playground. There are a lot of students on the playground. Some students are running on the grass. A little boy is running after them. Some boys are sitting on the grass. They are talking. Two girls are flying a nice kite. Three teachers are standing under a tree, and they are watching the students playing. There is a basketball on the playground and two students are playing. Everyone on the playground is very happy.
( )1. How many students are there on the playground ?A. A few . B. A lot . C. No one .
( )2. How do students feel ?
A. Happy . B. Tired . C. Sad .
( )3. What are students doing ?
A. Some students are running on the grass and two students are playing .
B. Some boys are sitting on the grass and two girls are flying a nice kite.
C. A and B .
( )4. What is it on the playground ?
A. A basketball . B. A boat . C. A football .
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同类型试题
![](http://static.xuejinqu.com/images/medal.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)
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
![](http://static.xuejinqu.com/images/avatar.png)
![](http://static.xuejinqu.com/images/avatar.png)