Ag2S中混有少量AgCl，可以把该混合物加入以下哪种溶液中除去AgCl（） A

阅读理解。

    The great ship, Titanic, set off for America in April 1912 on its first trip. It carried more than 1 000

people. 

    The Titanic was the largest and finest ship at that time and it had 16 compartments (密封舱). Even if

(即使) four of those compartments were broken, it would still be able to stay on the sea.

     Four days later, when the Titanic was crossing the sea, the man on watch suddenly saw a very large

iceberg ahead. The great ship turned in time, but soon there was a great noise from below. The captain

went down to see what the matter was. To his surprise, he found the ship was sinking fast because 5

compartments were broken! Hundreds of people jumped into the water. As there were not enough lifeboats,

about 1 500 lives were lost.

根据短文内容，完成下列各题。

1. The ship Titanic set off from England to ____.

2. The captain was ____ to find the ship was sinking fast.

3. How many people lost their lives?

    _________________________________________________

4. Which of the following is NOT true?

                                                                                                                                                       [ ]

A. The captain went down to see what the matter was.

B. Hundreds of people jumped into the sea.

C. 5 compartments of the Titanic were broken.

D. Most of the people were saved.

5. Write down the best title for the passage.

    ________________________________________________

t分布与标准正态分布相比（）

A.均数要小

B.均数要大

C.标准差要小

D.标准差要大

E.均数和标准差都不相同

美轮美奂的蒙山沂水、波澜壮阔的电视剧《沂蒙》、商业运作的节庆品牌，是临沂市着力打造文化“软实力”、实现文化资源大市向文化产业强市发展的缩影。这样做的原因是[ ]

①文化作为一种精神力量可以转化为物质力量，对社会发展产生深刻影响

②提升文化软实力，能够为经济、政治的发展提供强大的精神动力和智力支持

③文化的力量能够熔铸在民族的生命力、创造力和凝聚力之中，是综合国力的重要标志

④必须把文化建设作为社会主义现代化建设的重要战略任务，大力发展文化产业

A、①②③

B、①②④

C、②③④

D、①②③④

德国西门子产高压开关本体应能承受的工频耐压值为（）。

A.10V

B.2lkV

C.28KV

D.55KV

特种结构