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问题 选择题
我们规定电流方向是（　　）

A．正电荷定向移动的方向

B．负电荷定向移动的方向

C．正电荷移动的方向

D．负电荷移动的方向

答案

答案：A

单项选择题

脂肪酸的生物合成（）

A.不需要乙酰CoA

B.中间产物是丙二酸单酰CoA

C.以NADH为还原剂

D.在线粒体内进行

E.最终产物为十碳以下脂肪酸
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补全对话，情景问答
从方框中A-G中选择五个合适的句子填入空白处，使对话完整通顺。
A. That's a good idea.                        
B. Would you like to go to the theatre.
C. Would you like to go there with me ?          
D. Where is it ?
E. What day is today ?                        
F. How many people are there ?
G. It's on Sunday afternoon.
A: Hello, Kate!                            
B: Hello, Bill.
A: __1___                 
B: Today is Friday.
A: There is a football match at Capital Stadium. __2___
B: A football match ?
A: Yes, it's between Dalian and Shanghai,      
B: __3___ Let's go there. When is it?
A: __4___
B: Let's go on that day. __5___ There is a magic show tonight.
A: Great. Let's go there first.
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