动、植物细胞结构上的最大区别是[ ] A．有无细胞膜 B．有_爱下问搜题

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问题选择题

动、植物细胞结构上的最大区别是[ ]

A．有无细胞膜

B．有无细胞壁

C．有无细胞质

D．有无细胞核

答案

答案：B

补全对话，情景问答

读下面对话，从所给的七个选项中选出五个正确答语完成对话。

(Millie and Daniel are talking about yesterday's Maths exam.)
(M=Millie D=Daniel)

A. If I can't pass, I will not enjoy my weekend.
B. It was easy for me, I think.
C. Would you like to help me with my Maths?
D. I can go to the zoo instead of you.
E. I hope you can pass it.
F. It was difficult for me.
G. Can you pass it?

M: What do you think of yesterday's Maths exam, Daniel?
D: 1.             You know, I am not good at Maths. But I did my best.
M: 2.
D: I'm not sure.3.            .
M: What do you mean?
D: I mean that I cannot go to the zoo this weeked. My parents will make me study at home.
M: Oh, never mind. 4.
D: Thank you, Millie. I hear you are good at Maths. 5.
M: No problem.

问答题简答题

制造合成气有哪几条工艺路线？各自的主要原料是什么？