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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
【单选题】平衡水是指（）.
A.
以物理化学方式与物料结合的水分
B.
以机械方式与物料结合的水分
C.
干燥过程中除不去的水分
D.
干燥过程中能除去的水分
E.
动植物细胞壁内的水分