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【多选题】
下列关于汗液的叙述,正确的有A.
汗液中不含蛋白质
B.
刚分泌出的汗液渗透压高于血浆
C.
汗液中的Na浓度受醛固削调节
D.
由汗腺细胞被动分泌
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皮皮学刷刷变学霸
举一反三
【单选题】Whom is the person phoning?
A.
General Public Services.
B.
City Chiropractic.
C.
A water supplier.
D.
Letta Parks.
【单选题】Since we ____ for almost two weeks, I’ll need to buy a large backpack in advance to carry my supplies of food and water.
A.
have walked
B.
will be walking
C.
have been walking
D.
walked
【单选题】听力原文：Okay, Alan and I are ready to get going. We have the food and most of the supplies, and we've put both kayaks on the roof of your car. You should drive ahead of us—we'll follow closely behind you...
A.
Skiing
B.
Boating
C.
Camping
D.
Fishing
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