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【多选题】
生物化学是指用化学的方法和理论研究生命的化学分支学科。生物化学主要研究A.
生物体分子结构与功能
B.
物质代谢与调节
C.
遗传信息传递的分子基础
D.
调控规律
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【简答题】请翻译以下两句: 1. In recent years, there has been a sharp growth in the number of tour operators who offer tours led by expert guides, and such holidays are often enhanced by special access to private colle...
【简答题】完形填空。 Chinese tennis is entering a golden time. In recent years there has been an explosion of 1 female tennis players bursting onto the global scene. And this couldn't have come at a 2 time with the ...
【单选题】In recent years, there have been over 30 foreign companies __________ business in this city.
A.
doing
B.
do
C.
to do
D.
done
【简答题】D继电半自动闭塞请求发车作业过程中两站间共传递两种闭塞信息，分别是（ ）和（ ）。
【简答题】依据观赏部位对花卉进行分类可分为 、 、 、 、 五类。
【单选题】选出正确答案 1. In recent years, there have been over 70 foreign companies ________ business in this city
A.
doing
B.
do
C.
to do
D.
done
【简答题】精密齿轮高频淬火后需磨削齿面和内孔,以提高齿面和内孔的位置精度,常采用以下原则来保证____
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