生物的遗传物质和生命活动的承担者分别是 ①核酸 ②DNA ③RNA ④蛋白质 ⑤脂质 ⑥糖类

题干

生物的遗传物质和生命活动的承担者分别是（）

①核酸 ②DNA ③RNA ④蛋白质 ⑤脂质 ⑥糖类

A：②⑤

B：③⑥

C：①④

D：②④

上一题下一题 0.0难度选择题更新时间:2011-03-16 03:34:24

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C

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根据对话内容，从方框内所给的选项中选出最佳选项，将其答案的序号写在方框下面的横线上，选项中有两项为多余项。
W: Sorry, I can't. ____
M: Are you having an exam tomorrow?
W: Yes. ____
M: I wish you good luck.
W: Thanks. But I am a little afraid.
M: Afraid? ____
W: But I haven't worked hard in the past few days.
M :____
W:Oh, I like my English teacher, Sue, best. She teaches history and she always makes the lessons interesting.
M: Do all the students like history?
W :____ My friend Tom hates it, because we have lots of homework every Monday and every Wednesday we have a test.

A. Why do you like your history teacher?
B. Who is your favorite teacher?
C. Yes, it's such an interesting subject that we all like it.
D. I have to go over my lessons.
E. Oh, no!
F. We are having our mid-term exam.
G. You always study well.

题干

答案(点此获取答案解析）

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