综合安全技术关于企业防尘、防毒的基本原则和要求,说法错误的是______。 A.原材

题型:单项选择题

问题:

综合安全技术

关于企业防尘、防毒的基本原则和要求,说法错误的是______。

A.原材料选择应遵循无毒物质代替有毒物质,低毒物质代替高毒物质的原则
B.对产生粉尘、毒物的生产过程和设备(含露天作业的工艺设备),应优先采用机械化和自动化,避免直接人工操作
C.对于逸散粉尘的生产过程,应对产尘设备采取半封闭措施
D.在放散有爆炸危险的可燃气体、粉尘或气溶胶等物质的工作场所,应设置防爆通风系统或事故排风系统

考点:安全工程师安全生产技术安全生产技术
题型:单项选择题

Can you imagine a world without the Internet? It’s surprising to think about it.

Now, China has more than 162 million Internet users, according to the China Internet Network Information Centre. This is the second highest number of user in the world after the United States. Today, 66%of Chinese “netizens (网民)” are teenagers. “They spend about thirteen hours every week online,” said Qian Hulin, an Internet expert(专家). Doctor Song in Beijing Xuanwu Hospital said about 14% of Chinese netizens who are teens often lasted over ten hours to play online games.

The main reasons why teenagers surf the Web are to search for information, to communicate with others and to have fun. On the Internet, teenagers can find out almost anything. And surfing the Web can help students with their homework and widen their knowledge.

Li Dong, a teacher at No. 41 Middle School in Shijiazhuang, likes her students to use the Internet. “When we talk in class, students who surf the Net usually know more background information than the others,” she said.

In addition, people can use the Internet to write letters or stories and send e-mails. Many teens keep in touch with their friends online. It is cheaper than phoning somebody far away and also much quicker.

小题1:_______ has the most Internet users in the world according to the article.

A.China

B.America

C.Canada

D.Russia小题2:There are about _______ Chinese netizens to surf about 13 hours every week.

A.107 million old

B.22.7 million old

C.107 million young

D.22.7 million young小题3:Song said some teenagers continued _______ more than ten hours.

A.playing online games

B.searching for information

C.chatting with their friends

D.sending e-mails to others小题4:Li Dong in No. 41 Middle School likes her students to use the Internet because she

______.

A.thinks surfing the net can help students spend less time on homework

B.thinks her students can get more background information than the others

C.wants her students to talk to her about their hobbies and interests

D.wants to know what her students do and think about at home小题5:Which way is the cheapest and quickest to learn something about friends far away?

A.Giving them a call.

B.Going to see them.

C.Writing a letter to them.

D.Sending e-mails to them.

题型:单项选择题

男,63岁,高血压病10年,血压一直维持130~140/85~95mmHg。近1年来尿蛋白+,发现糖耐量异常。降压药物的最佳选择是

A.利尿剂

B.钙通道阻滞剂

C.β-受体阻滞剂

D.转换酶抑制剂

E.血管扩张剂

题型:单项选择题

 下列关于温度、热量和内能的说法中正确的是[ ]

A.物体温度升高,一定吸收了热量   

B.物体放出热量时,温度一定降低

C.物体温度升高,内能一定增加   

D.物体内能增加时,温度一定升高

题型:单项选择题

保持法律的稳定性和连续性,是我国法律()

A、制定的原则

B、实施的原则

C、适用的原则

D、执行的原则

题型:单项选择题

起重吊装中的旗语“绿旗下垂胸前红旗横档下方”表示()。

A、微落

B、下落

C、臂杆下落

D、缩臂杆

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