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问题 选择题

对于四舍五入得到的近似数4.8×105，下列说法正确的是 [ ]

A．有2个有效数字，精确到万位

B．有2个有效数字，精确到个位

C．有6个有效数字，精确到万位

D．有6个有效数字，精确到个位

答案

答案：A

补全对话，情景问答

情景交际。

A: Hello, is that Wu Bin speaking?

B: Yes. Who's that?

A: This is Tian Hong. Are you free this Saturday evening?

B:    (1)  

A: I've got two tickets to Jay Chou's concert.    (2)  

B: Certainly, I'd love to. He's my favorite singer. It's very nice of you.    (3)  

A: Let's meet at the gate of the park at four o'clock.

B:    (4)   I want to buy him a gift.

A: OK. I'll get there at three. Shall we go to the shopping center to buy the gift?

B:    (5)   See you then.

A: See you.

A: Would you like to go with me?          

B: Sounds good.

C: When and where shall we meet?          

D: I'll see a movie.

E: Could you please get there earlier?      

F: Yes. What's up?      

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单项选择题

关于生殖器结核的诊断，哪项是错误的

A．盆腔X线平片检查，发现孤立钙化点，提示盆腔结核病灶
B．经血或子宫内膜结核菌培养阴性，不可除外生殖器结核
C．腹腔镜检查为最直接、最可靠的诊断方法
D．血沉正常不能除外结核病
E．结核菌素试验阴性，表示未感染过结核
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