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【单选题】
羊水脂肪细胞计数是胎儿哪个脏器成熟的检测指标A.
肺成熟度
B.
皮肤成熟度
C.
肾脏成熟度
D.
肝脏成熟度
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皮皮学刷刷变学霸
举一反三
【单选题】The school recommends parents ______ their children to swim in rivers or lakes during summer holidays. [ ]
A.
not permit
B.
do not permit
C.
mustn't permit
D.
couldn't permit
【简答题】Where does the fresh water come from? It comes from rivers, lakes and__________.
【单选题】The atmosphere is ______ much a part of the earth as its soil and water of its lakes, rivers, and oceans.
A.
so
B.
very
C.
even
D.
as
【简答题】阅读理解。 Africa is home to nearly 700 lakes and rivers. It holds the largest amount of water on earth. Because of the overuse of the lakes, natural climate changes and other factors (因素), these lakes are...
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