列举秦汉时期我国领先于世界的科技成就。（至少3项） ______________

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问题列举题

列举秦汉时期我国领先于世界的科技成就。（至少3项）

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答案

造纸术；九章算术》中提出的附属概念和正负数的加减运算；麻沸散等。

补全对话，情景问答

情景交际。

A: Can you cook, Liu Fang?

B: No, I can't. 1.______ 2.______you?

A: I can.

B: 3.______ teaches you to cook?

A: My mother. She wants me to do some housework on Saturdays and Sundays.

B: 4.______do you want to eat?

A: Some meat, rice and eggs.

B: Do you like fruit?

A: Yes, a little. What about you?

B: I don't like fruit at all.I like eggs and meat. Can you help me to cook?

A: 5.______. I can do that tomorrow afternoon.

B: Thanks a lot.

A: You're welcome.

填空题

原核生物基因重组的方式有、、和。