《医疗用毒性药品管理办法》规定，生产毒性药品必须严格执行生产工艺操作规程，在本单位药

有甲、乙两台设备可供选用，甲设备的年使用费比乙设备低2 000元，但价格高于乙设备 6 000元。若资本成本为12%，甲设备的使用期应长于3.49年，选用甲设备才是有利的。 ( )

如图3(a)所示电路，在测量电阻的实验中，R为镍铬丝，R＇为滑动变阻器。

(1)在圆圈中填上两表符号。

(2)移动滑动变阻器滑片P是为了改变____。

(3)R两端电压的最大值为____伏。

(4)设R约为3欧，用笔线代替导线把图3(b)的元件连接成电路（注意导线不交叉，元件位置不移动）。

（9分）有一包粉末，可能由KCl、K₂SO₄、K₂CO₃、CuCl₂、MgCl₂中的一种或几种物质组成。现做如下实验：

实验一：取少量粉末，加水溶解后得到无色透明溶液①。

实验二：取①溶液少许，加入氢氧化钠溶液后看不到明显现象。

实验三：另取①溶液少许，加入适量氯化钡溶液后出现白色沉淀。过滤后得到滤液②，在沉淀中加入适量稀硝酸，沉淀全部溶解。

实验四：取滤液②少许,滴加少量硝酸银溶液出现白色沉淀，在沉淀中加入足量稀硝酸，沉淀不溶解。

根据以上实验，请回答：

（1）原粉末中一定没有______________________________，一定有_________________。

（2）原粉末中可能有_______________________，为了验证可能含有的成分是否存在，请你设计实验证明：

下列各项中，标点符号使用正确的一项是（）

A．这是一个繁华的大都市，每天忙碌的人熙熙攘攘。

B．“找到了！找到了！”那人边说边把药瓶递给身边的人：“赶快传过去！”

C．作文竞赛中，4200多名考生有近3000人讲述了被父母逼着参加奥赛、练琴、画画；做着永远也做不完的练习题的“悲惨遭遇”。

D．孩子！我们之前曾发生过一个美丽的故事，你的一篇作文给我们创造了一份有价值的记忆。

In just two months, the latest buzzword from the Internet, diaosi, has spread so much that it can be found everywhere—from online forums(论坛) to micro blogs. Many people even call themselves diaosi. It’s not the first time a term has gone popular on the Internet in China. However, why is the word so viral that is has become a cultural phenomenon? Here, we tell you something you want to know about it.

Where it began

The word originated in Baidu. Com’s Tieba (a top Chinese bulletin board system) of soccer player Li Yi. There, fans of Li, who are called yisi in Chinese, not only talk about soccer but complain about their lives, work and relationships. Yisi, who are known for their rude and dirty language, were given the name diaosi by others who have seen their posts.

What a “diaosi” is like

The word diaosi was coined first by single, young men who feel they have dead-end lives. Generally, men in this category don’t earn enough, are not good-looking, and have difficulty winning promotion(晋升). Unlike their upper-class contemporaries(同代人), they lack influential families, useful social networks for their careers, and most importantly, suitable women to marry. “I’m just a diaosi, poor and plain-looking. Who will marry me?” The sigh can be heard, which is half self-mockery(自嘲), half reality. Many young men call themselves diaosi because they feel they are among the lowest classes of the society.

“Diaosi” culture reflects social changes

According to Zhu Chongke, a professor in the School of Asia-Pacific Studies at Sun Yat-sen University in Guangzhou, the popularity of this word diaosi stems from the fact that is was created by common people and thus resonates(共鸣) with a huge population. “Labeling yourself a diaosi offers a way for people to mock themselves and relieve pressure, hence it spread quickly,” he told Xinhua Agency. “The attitude is basically: ‘I already have little to lose, so why don’t I mock myself for gun?’.” The phenomenon reflects a larger social issues. These young people have no influential family background, no chances of receiving promotion at work or no economic strength to find a proper woman to marry. It reflects a deep sense of loss.

小题1:Diaosi refers to the ones with following features except      .

A．the ones who don’t earn much.

B．the ones who are not good-looking.

C．the ones who have difficulty winning promotion

D．the ones who have suitable people to marry.小题2:The word “diaosi” is so popular because         .

A．It was used to describe the fans of soccer player Li Yi.

B．It was created by common people and resonates with a huge population.

C．It is new and interesting.

D．It helps people who are among the lowest classes mock themselves.小题3:Which of the following is NOT true?

A．It’s not the first time a term like “diaosi” has gone popular on the Internet.

B．The name “diaosi” was given by those people who are among the lowest classes.

C．Many young people call themselves diaosi because they have a deep sense of loss.

D．Calling yourself diaosi can probably mock yourselves and release pressure.小题4:The author’s attitude to diaosi is      .

A．positive

B．negative

C．neutral(中立的)

D．indifferent