回转式压缩机油气分离效果的最终评定，是测定（）中的实际含油量。
A.吸气
B.排气
C.油箱
D.废油池
参考答案：B
—Peter，is there anything else you want to know about China?
—Yes，I am still wondering __________ .
A．how is Chinese paper cut made
B．how was the Great Wall built in ancient times
C．why the Chinese people like to play the dragon dance
D．why do the Chinese people eat rice dumplings at Dragon Boat Festival
企业内常用机动车辆分为（）。
A、8大类
B、10大类
C、12大类
