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举一反三
【判断题】全程留着率(overall retention)有时又称为真实留着率（true retention），是指造纸机干部卷取出来的物料（纸页）与进入造纸机湿部的物料（纸料）之比。
A.
错
B.
对
【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