选择题：It is better to ask someone for advice rather than

题目内容：

It is better to ask someone for advice rather than ___something.(本题2.0分)
A、 risk doing
B、 risk to do
C、 to risk doing
D、 to risk to o

参考答案：

5Please write a report（）the above subjects are to

5Please write a report（）the above subjects are to be covered.A、whichB、in whichC、

4个人站在有光滑固定转轴的转动平台上，双臂伸直水平地举起二哑铃，在该人把此二哑铃水平收缩到胸前的过程中，人、哑铃与转动平台组成的系统的（）A、机械能守恒，角动量

What is the national anthem of the United Kingdom?(本题1.0分) A、 Rule Britannia B、

计算机中,运算器的主要功能是完成____(本题2.0分) A、代数和逻辑运算 B、代数和四则运算 C、算术和逻辑运算 D、算术和代数运算

The _____ part of America consists of high plateaus and mountains formed by the