（）是专门用来堆码或提升货物的机械（）
A.电动拖板车
B.牵引车
C.传送带
D.堆垛机
参考答案：D
— Will you please help me _____ the exercise books to the students?
— Sorry I have been in a race and my strength has completely _____.[ ]
A. give out; given out
B. give off; given up
C. give out; given in
D. give up; given up
0.1级电能表标准装置的输出电压、电流的波形失真度应不大于3%。
