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【多选题】
( ) 苹果酸天冬氨酸穿梭作用可以:A.
生成 2.5 个 ATP
B.
将线粒体外 NADH 所带的氢转运入线粒体
C.
苹果酸和草酰乙酸可自由穿过线粒体内膜
D.
谷氨酸和天冬氨酸可自由穿过线粒体膜
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【单选题】— Do you have anything _______ for this Saturday afternoon? — Not yet. [ ]
A.
to be planned
B.
to plan
C.
planning
D.
planned
【简答题】v. 供应,供给,提供 p_____________
【单选题】某工厂生产甲和乙两种产品，甲产品的日产量是乙产品的1.5倍。现工厂改进了乙产品的生术技术，在保证产量不变的前提下，其单件产品生产能耗降低了20%，而每日工厂生产甲和乙两种产品的总能耗降低了10%。则在改进后，甲、乙两种产品的单件生产能耗之比为?
A.
2：3
B.
3：4
C.
4：5
D.
.5：6
【单选题】We are not allowed _____ outdoors with some other children. [ ]
A.
playing
B.
to be playing
C.
to play
D.
be playing
【单选题】Wrought iron has an inherent resistance to corrosion but is not to be had freely , its place has been taken by the cuprous alloysAccording to the above sentence , which of the following statements is ...
A.
Wrought iron can resist liquids flow
B.
It is difficult to attain the wrought iron
C.
Wrought iron should be combined with cuprous alloys
D.
The cuprous alloys have mere disadvantages than wrought iron
【简答题】阅读理解。 Paper Plane to Be Dropped from Space For most people, it is enough to see their paper planes fly for a few feet. The Japanese, however, want to make a paper plane fly for 240 miles from space. T...
【简答题】某工厂有A、B两种配件生产甲、乙两种产品，每生产一件甲产品使用4个A配件耗时1h，每生产一件乙产品使用4个B配件耗时2h，该厂每天最多可从配件厂获得16个A配件和12个B配件，按每天8h计算，若生产一件甲产品获利2万元，生产一件甲产品获利2万元，生产一件乙产品获利3万元，采用哪种生产安排利润最大？
【简答题】某工厂有机器A共11台，每台每天可生产产品甲11个或产品乙20个；有机器B共5台，每台每天可生产产品甲15个或产品乙30个；有机器C共16台，每台每天可生产产品甲11个或产品乙15个；有机器D共8台，每台每天可生产产品甲8个或产品乙10个。求在生产产品甲260个的情况下，生产产品乙越多越好的机器生产能力的分配方案。
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