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问题 单项选择题

按HG20660《压力容器中化学介质毒性危害和爆炸危险程度分类》的规定最高容许浓度＜0.1㎎/m3为（）危害介质。

A、轻度

B、中度

C、高度

D、极度

答案

参考答案：D

选择题

人体血液的无机盐质量分数约为0.9%．研究表明，30亿年前原始海水的无机盐质量分数也约为0.9%．对此，下列观点不可取的是（　　）

A．人体血液仍然带有原始海水的某些印痕

B．人体血液和原始海水之间存在着某种尚未被认识的关系

C．人体血液和原始海水的无机盐的质量分数相同纯属巧合

D．人类的祖先可能是从原始海洋中的原始生命逐渐进化而来的
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填空题

Tidiness


Tidiness means keeping things out of sight and yet available when wanted. It implies that there is a (1) for everything and that each thing used finds its way (2) to its place by a continuos process, not by a spasmodic (3) . The process depends, however, upon the drawer, cupboard and storage (4) being provided, for lack of which one things may literally have (5) place to go. Like the perambulator and trolley, the luggage and the golfclubs (6) be homeless. The same may be true of the deck-chairs (7) the bulkier plastic toys. As there is no place for them, it is no (8) telling people to put them away. The architect who thus economises on (9) space is apt to claim that a good-sized sitting-room is (10) result. What advantage is there in that, however, (11) half the living-room has to be used for storage The aesthetic (12) depends, in turn, upon storage space. (13) it may be true that no house ever had cupboards enough, (14) are some houses which have practically no cupboards (15) all. In these our choice must lie between chronic (16) and ruthless destruction. That is not to say, however, (17) cupboard space will itself create tidiness. Some people (18) happier, it would seem, in chaos. There is the question, furthermore, (19) the cupboards themselves are tidy. That (20) has been swept out of sight is no proof, in itself, that everything can be found.
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