下列定义变量的语句中正确的是( )。 A．int _jnt, B．double

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问题单项选择题

下列定义变量的语句中正确的是( )。

A．int _jnt,
B．double 3int_;
C．char for;
D．float US＆;

答案

参考答案：A

阅读理解

任务型阅读：根据表格信息完成下列句子

If you want to go to Beijing from Zhengzhou, the information below can help you.

1. The cheapest way from Zhengzhou to Beijing is by ____.

2. The fastest way from Zhengzhou to Beijing is by_ ___

3. The earliest transportation from Zhengzhou to Beijing is by__ __.

4. The longest travel from Zhengzhou to Beijing is by__ __

5. The____ _____leaves at night.

选择题

如图所示，某人以拉力F将物体沿斜面拉下，若拉力大小等于摩擦力，则下列说法正确的是（　　）

A．物体做匀速运动

B．合外力对物体做功等于零

C．物体的机械能保持不变

D．物体的机械能减小