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问题 单项选择题 A3/A4型题

一项吸烟与肺癌死亡率关系的研究表明，吸烟者的肺癌死亡率为0.57‰，不吸烟的肺癌死亡率为0.07‰。

归因危险度百分比（）

A.88%

B.85%

C.77%

D.54%

E.63%

答案

参考答案：A

阅读理解

读一读，填一填。

Jack: When is your birthday, Mary?

Mary: It's in February.

Jack: I know. But what's the date?

Mary: It's February 19th.

Jack: And when is your dad's birthday?

Mary: It's September 21st.

Jack: That's today! Mary.

Mary: Oh, no!

1. Mary's birthday: __________________________________ 

2. Her dad's birthday: ________________________________

3. Date for today: ___________________________________
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选择题

用如图所示的装置制取气体，需满足的条件是:①反应物是固体；②反应需要加热；③制得的气体不易溶于水；④制取的气体密度比空气大；⑤制得气体能与空气中氧气反应．

[ ]

A．①②③④⑤

B．②④⑤

C．①②

D．①②③
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