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【单选题】
用蒸馏法测水分，若结果偏低，原因可能是（）。
A.
溶剂水分未脱尽
B.
试验前冷凝管壁没用棉花擦
C.
冷凝管上端没有塞住
D.
停止加热后冷凝管内壁的水滴未刮下
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The Antarctica is actually a desert. It is the only continent on the earth without a river or a lake. The Antarctica is all ice all year round. The warmest temperature ever recorded there is zero, at ...
A.
it gets wet
B.
the next snowfall comes
C.
the temperature gets colder
D.
the snow above it is heavy enough