学生数以人作为计量单位，这种计量形式称为（）。
A、自然计量单位
B、标准实物单位
C、度量衡单位
D、劳动单位
参考答案：A
选词填空
1. He said to _____ ( himself, him, he) , "Why hasn't she come yet?"
2. You can't always think of _____ ( yourself , yourselves ,your). You must think more of others.
3. Mike taught_____ ( himself, he, him) maths when he was a child.
4. Help _____( yourself , your , you ) to some meat , Alice .
5. We learn English over the radio_____ ( ourselves,our, us) .
风力达（）以上、不准进行升降机架设作业。
A、4级
B、6级
C、8级
D、10级
