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问题 单项选择题

检查有毒杂质砷时，有古蔡法，Ag-DDC法，当有大量干扰特别是锑存在时，可采用的方法是

A．古蔡法

B．氯化亚锡十二氯化汞(白田道夫法)法

C．Ag-DDC法

D．古蔡法加SnCl2法

E．Ag-DDC法加SnCl2法

答案

参考答案：B

阅读理解

Sophia is very happy these days. The 13-year-old girl from the UK has a lot of fun during her trip in Beijing. She eats dumplings, tries Chinese calligraphy(书法), climbs the Great Wall and speaks Chinese, all for the first time!

She even stays with a Chinese family for a week. “Beijing is very big and beautiful. And the people here are very nice!” She says. Sophia comes with her teachers and classmates from the UK. The students in Shangdi Experimental Primary School of Haidian District receive them. These two schools are “Heart to Heart” schools. There are 200 “Heart to Heart” schools in Beijing. Each of them has a partner school in a foreign country. They meet and get to know each other.

小题1:How old is Sophia?

A．15

B．14

C．13

D．11小题2:How long did Sophia stay with a Chinese family?

A．Two days.

B．Seven days.

C．A year.

D．6 months.小题3:What did Sophia think of Beijing?

A. Big.        B. Beautiful.     C. Exciting.       D. A and B.
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单项选择题

下列情况除了哪项外都应及时向中心领导请示（）。

A、接到工伤、中毒、灾害事故、回送业务的求助电话

B、救护法定传染病，不明病因的患者后

C、出车发生交通事故

D、工作服破损
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