【单选题】生物体内的蛋白质千差万别,即使像催产素、牛加压素、血管舒张素等由相同数量的氨基酸构成的蛋白质,生理功能也差异性很大。其原因不可能是( )
【单选题】大量使用下列哪项利尿剂可能产生低渗性脱水
【单选题】听力原文:Sara: Now, let me just see. Yes, it certainly is swollen and rather inflamed. Sally: And, it seems to be going rather blue, doesn't it? Sam: Mm. Yes. Well, it could, of course, be a simple sprain...
【单选题】Passer-by: Is there a taxi stand on this street? Local resident: Let me see. Oh, yes, ______. Passer-by: Oh yes, I see it.
A.
it's not far from here
B.
you can see it from here
C.
there's one in front of the bank
D.
go to the bank to find it
【单选题】关于油脂的说法不正确的是( )
A.
油脂的熔沸点与组成油脂的高级脂肪酸的饱和程度密切相关
B.
组成油脂的高级脂肪酸的饱和程度越大,熔沸点越高
C.
组成油脂高级脂肪酸的不饱和程度越大,熔沸点越高
【判断题】脂肪酸的碳链越长、饱和程度越高,油脂的熔点越高。动物脂肪含不饱和脂肪酸较较少,所以在室温下呈固态。
【单选题】下列说法中正确的是 [ ]
B.
油脂在碱性条件下水解比在酸性条件下水解更容易发生