基轴制中是以（）为基准轴，其上偏差为零。
A.孔
B.平面
C.轴
D.孔或轴
参考答案：C
行车中当机动车突然爆胎时，驾驶人切忌慌乱中急踏制动踏板，尽量采用抢挂低速档的方法，利用发动机制动使机动车减速。
Find the right answers. (给下列句子找到相应的答语。)
( )1. Who's that boy?
( )2. Let's watch TV!
( )3. How many rulers do you have?
( )4. Look at my new kites!
( )5. Where are you from ?
A. Great!
B. I'm from China.
C. Oh, how nice!
D. He's my brother.
E. I have 16.
