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【单选题】
排水取气最后，细口瓶内瓶口封液应（）
A.
全部排除
B.
保留10～30cm3
C.
保留10～30cm
D.
保留0.5L左右
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】In its early history, Chicago had floods frequently, especially in the spring, the streets so muddy that people, horses, and carts got stuck. An old joke that was popular at the time went somet...
A.
horses were fairly useful in Chicago
B.
Chicago"s streets were extremely muddy
C.
Chicago was very erous in the spring
D.
the Chicago people were particularly humorous
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