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【单选题】
血红素合成不需要下列哪种物质?A.
谷氨酸
B.
甘氨酸
C.
琥珀酰CoA
D.
Fe 2+
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反馈参考答案：
举一反三
【单选题】One of the most hazardous conditions a fire- fighter will ever encounter is a backdraft (also known as a smoke explosion). A backdraft can occur in the hot-smoldering phase of a fire when burning is i...
A.
there is not enough oxygen for breathing.
B.
the heat is extremely intense.
C.
the smoke is dangerously thick.
D.
an explosion occurs.
【单选题】Of course, there is always the glimmer of hope that someone in the audience will have a brainstorm, a flash of medical insight. (par.3, p33)
A.
faint sign
B.
small evidence
C.
big sign
D.
big evidence
【单选题】By '...is there a lack of creative talent on a par with Miyazaki... '(Paragraph 2) the author means
A.
Miyazaki is at his wits end.
B.
few are as inherently creative as Miyazaki.
C.
Miyazaki's achievements are overestimated.
D.
there is lack of fresh blood in Japanese animation.
【单选题】By '...is there a lack of creative talent on a par with Miyazaki...'(Paragraph 2) the author means
A.
Miyazaki is at his wits end.
B.
few are as inherently creative as Miyazaki.
C.
Miyazaki's achievements are overestimated.
D.
there is lack of fresh blood in Japanese animation.
【简答题】采用可转位式夹具以及回转工作台都是通过减少( )时间来提高生产率。
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