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【单选题】
重度脱水与中度脱水的主要区别A.
皮肤弹性差
B.
眼窝凹陷
C.
尿少
D.
代谢性酸中度
E.
明显周围循环衰竭
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举一反三
【多选题】How is nitrate assimilated by nitrate reductase and nitrite reductase in microorganisms, plants, and the animals?
A.
More than 90% of the NH 4 + generated by vascular plants, algae, and microorganisms comes from nitrate assimilation, a two-step process.
B.
First NO 3 ˉ is reduced to NO 2 ˉ by nitrate reductase, then the NO 2 ˉ is reduced to NH 4 + in a six-electron transfer catalyzed by nitrite reductase.
C.
Nitrate reductase is a large, soluble protein (Mr 220,000). Within the enzyme, a pair of electrons, donated by NADH, flows through - SH groups of cysteine, FAD, and a cytochrome (cyt b 557 ), then to a novel cofactor containing molybdenum, before reducing the substrate NO 3 ˉ to NO 2 ˉ.
D.
Six electrons, donated one at a time by ferredoxin, pass through a 4Fe-4S center in the enzyme, then through a novel heme-like molecule (siroheme) before reducing NO 2 ˉ to NH 4 + . In nonphotosynthetic microbes, NADPH provides the electrons for this reaction.
【单选题】中国国家主席习近平在和平共处五项原则发展六十周年纪念大会上强调,我们将坚定不移地走和平发展道路,坚持独立自主的和平外交政策。我国坚持独立自主的和平外交政策的决定因素是( )
A.
国家利益和国家力量
B.
国家利益和国家性质
C.
党的性质和政府宗旨
D.
国际关系和国家主权
【单选题】--You know who came yesterday? --Yao Ming? -- He came and watched the basketball match we had yesterday
A.
You guessed it!
B.
How did you know that?
C.
Well done!
D.
That was great news!
【简答题】13 --You know who came yesterday? --Yao Ming? -- He came and watched the basketball matchwe had yesterdayA. You guessed it! B. How did you know that? C. Well done! D. That was great news!
【单选题】中国国家主席习近平在和平共处五项原则发展六十周年纪念大会上强调,我们将坚定不移地走和平发展道路,坚持独立自主的和平外交政策。我国坚持独立自主的和平外交政策的决定因素是( )
A.
维护世界和平,促进共同发展
B.
和平共处五项原则
C.
独立自主,不结盟
D.
加强和发展同发展中国家的团结与合作
【判断题】No two electrons in the same atom can have the same four quantum numbers.
A.
正确
B.
错误
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