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【单选题】Obtaining Drinking Water from Air Humidity Not a plant to be seen，the desert ground is too dry．But the air contains water，and research scientists have found a (51) of obtaining drinking water from a...
A.
who
B.
where
C.
when
D.
which
【单选题】薄皮肤的组成从浅到深是 ( )
A.
角质层、颗粒层、棘层、基底层
B.
角质层、棘层、颗粒层、基底层
C.
角质层、透明层、颗粒层、棘层、
D.
角质层、透明层、棘层、基底层
E.
透明层、颗粒层、棘层、基底层、