易发生结核菌、病毒素、沙门菌感染常见于A.T淋巴细胞缺陷B.B淋巴细胞缺陷C.巨噬细

题型:单项选择题

问题:

易发生结核菌、病毒素、沙门菌感染常见于

A.T淋巴细胞缺陷
B.B淋巴细胞缺陷
C.巨噬细胞缺陷
D.自然杀伤细胞(NK)缺陷
E.中性粒细胞缺陷

考点:卫生资格考试(中初级)儿科主治医师遗传代谢及免疫缺陷病
题型:单项选择题

Electronics are being recycled in record numbers as more states require it and more companies collect and even pay for discarded items, but the gains come with controversy.

Some environmentalists complain that recycling is not keeping pace with electronics sales. Some say e-waste is being dumped in developing countries, where toxic materials such as lead and mercury can leach from landfills into groundwater.

"It is a success story, but we’d like to see it get more successful" to keep up with the electronics boom, says Janette Petersen of the Environmental Protection Agency (EPA). The amount of recycled items more than doubled from 1999 to 2007, the most recent year for which the EPA has figures. But as a percentage of all electronics, it increased less, from 15% to 18%. "The demand for electronics recycling has been growing," partly because of the switch last year to digital TV, says Jennifer Berry of Earth911. corn, a private group that keeps a database of recyclers. Last year, she says 31% of inquiries involved electronics, primarily TVs, batteries and computers.

Public and private efforts are expanding. Vermont became the 21st state last month to enact a law that requires e-waste recycling. Twenty-six companies--including Dell, Hewlett Packard, AT&T and Verizon--have partnered with the EPA on the Plug-In to eCycling program to promote electronics recycling since its launch in 2003. Companies such as Gazelle. corn pay for used gadgets such as iPods, which they resell or recycle. Best Buy and other stores are collecting more e-waste. Target announced last month that it put bins in every store to accept cellphones, MP3 players and ink cartridges.

Jim Puckett of Basel Action Network, a Seattle-based non-profit organization that aims to stop toxic exports, worries that some American companies dump e-waste in Africa to save money. "People are trying to look green, but they’re not telling you where it (waste) is going," he says. "You can’t turn over your TV to just any recycler. " He says it’s better to store an old TV than give it to a recycler that may export it to poor countries.

The Basel Action Network announced its e-Stewards program last month to ensure safe handling of electronics by using only recyclers certified by accredited organizations. It now lists 45 recyclers in 80 locations. Samsung and other companies have signed on. Environmental groups, including the Sierra Club, back it.

What is the main idea of the text()

A. Recycling of electronic items is a "success story"

B. Environmentalists are opposed to recycling electronics

C. Recycling can not keep pace with electronics sales

D. It is unnecessary to recycle electronics

题型:单项选择题

下列选项中,关于湖泊和水库说法正确的是()。

A.水库和人工湖泊是有区别的

B.湖泊和水库均有深水型和浅水型之分

C.湖泊和水库的水面形态都有宽阔型和窄条型

D.湖泊的定义是:内陆低洼地区蓄积着停止流动或慢流动而不与海洋直接联系的天然水体

题型:单项选择题

关于公诉案件被害人在法庭审理中的诉讼权利,下列选项中说法错误的是( )。

A.有权委托诉讼代理人

B.有权申请回避

C.无权参与刑事部分的法庭调查和辩论,只能参加附带民事诉讼部分的审理活动

D.对刑事判决部分不能提起上诉

题型:单项选择题

下列实验操作或方法不能达到实验目的的是 [ ]

实验目的 
实验操作或方法
A.
分离苯和水 
分液
B.
从海水中提取淡水 
蒸馏
C.
提取碘水中的碘 
用酒精萃取
D.
分离硝酸钾和沙子
溶解后过滤
题型:单项选择题

现代化干膜测厚仪极其精确,不需要按规定的要求进行校准。

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