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问题 单项选择题 A1/A2型题

当空气中气体污染物浓度较高时，可选择的采样方法是（）。

A.注射器取样

B.溶液吸收法

C.固体吸附剂采样管

D.分配型采样管

E.反应型采样管

答案

参考答案：A

解析：玻璃注射器采样、铝塑夹层袋采样、真空瓶采样均属于直接取样法，适用于空气中污染物浓度高于分析方法检测限的气态物质检测。玻璃注射器适用于气体和低沸点蒸气采样；铝塑夹层袋适用于采集不活泼气体如一氧化碳、二氧化碳；真空瓶适用于气体和蒸气采样，不同容积的不锈钢真空瓶，经内壁硅烷化处理，可以用于采集挥发性有机物，但应用前需用清洁空气清洗干净。

单项选择题

男性，56岁，原有冠心病劳力型心绞痛史，心电图V4～6T波倒置。3天来每天清晨5时出现剧烈胸痛发作，持续时间较往常心绞痛时间长，心电图示V4～V6T波由倒变直立，诊断为

A．恶化型劳力性心绞痛
B．卧位性心绞痛
C．变异型心绞痛
D．心内膜下心梗
E．心包炎
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单项选择题

TOKY—Our kids, the Japanese government announced, have forgotten how to behave. They can’t be bothered with housework. If they see someone being wronged, they probably look the other way.
Few countries have placed more importance on being well-behaved in public than Japan. The simplest requests for directions often result in guided tours. Smiling shopkeepers are still the rule. Lost wallets usually make their way to their owners.
But according to recent surveys, all that may be going the way of the ancient hairdo. And Japan’s government has gone into something of a crisis mode.
A Japanese Education Ministry Survey formed late in 1999 and made public last month found that Japan moves behind other nations in teaching youngsters right from wrong.
It also reported that Japanese children are less helpful and do far less housework than their foreign peers in all classes. But they are better about taking dirty dishes to the kitchens after dinner.
In addition, Japanese kids are more likely to dry their hair and carry cell phones than American and Chinese kids, according to another survey, by a Tokyo-based tank.
Children in about 8 percent of public school classrooms are so disorderly that teachers cannot hold lessons, further recent reports show. children refuse to sit, to listen or to stop talking.
Older and middle-aged Japanese continue to have a solid sense of good manners and social justice, says Professor Yoshina Hirano from Shinshu University, who was appointed to direct the ministry’s survey.
Despite the knowledge of good manners among adults, the breakdown in manners may be spreading, he said.

It is implied in this passage that Japanese kids ______.

A. spending much time doing their homework
B. lead an advanced modern life
C. have their hair cut too often
D. often wash dishes after dinner
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