在室外遇到雷雨时,下面哪种做法不容易出现危险?A.躲到广告牌下  B.躲到大树下

题型:单项选择题

问题:

在室外遇到雷雨时,下面哪种做法不容易出现危险?

A.躲到广告牌下 

B.躲到大树下 

C.无处可躲时,双腿并拢、蹲下身子

考点:燃气安全环保知识竞赛职业安全与健康职业安全与健康题库
题型:单项选择题

已知蓄电池在充电时作电解池,放电时作原电池。铅蓄电池上有两个接线柱,一个接线柱旁标有“+”,另一个接线柱旁标有“—”。关于标有“+”的接线柱,下列说法中正确的是

A.充电时作阳极,放电时作负极

B.充电时作阳极,放电时作正极

C.充电时作阴极,放电时作负极

D.充电时作阴极,放电时作正极

题型:单项选择题

重庆百货超市到厂家购进A、B两种酱油,A种酱油每瓶进价6.5元,B种酱油每瓶进价8元,购进140瓶共花了1000元.

(1)超市到厂家购进A、B两种酱油各多少瓶?

(2)重庆百货超市再以原来的进价购进A、B两种酱油共200瓶,计划投资不超过1420元,A、B两种酱油的售价分别是每瓶8元和10元,并且将这200瓶酱油卖完获利不低于339元,请你写出所有的进货方案.

题型:单项选择题

下列关于药品含义的表述不正确的是()。

A.药品用于预防、治疗、诊断人的疾病

B.药品有目的地调节人的生理功能

C.中药材、中药饮片、中成药、化学原料药属于药品

D.药品包括抗生素、生化药品、放射性药品

E.血液、疫苗、血液制品和诊断药品属于药品

题型:单项选择题

Silence is unnatural to man. He begins life with a cry and ends it in stillness. In between he does all he can to make a noise in the world, and he fears silence more than anything else. Even his conversation is an attempt to prevent a fearful silence. If he is introduced to another person, and a number of pauses occur in the conversation, he regards himself as a failure, a worthless person, and is full of envy of the emptiest-headed chatterbox. He knows that ninety nine percent of human conversation means no more than the buzzing of a fly, but he is anxious to join in the buzz and to prove that he is a man and not a waxwork figure(蜡塑人像).

The aim of conversation is not, for the most part, to communicate ideas; it is to keep up the buzzing sound. There are, it must be admitted, different qualities of buzz; there is even a buzz that is as annoying as the continuous noise made by a mosquito(蚊子). But at a dinner party one would rather be a mosquito than a quiet person. Most buzzing, fortunately, is pleasant to the ear, and some of it is pleasant even to the mind. He would be a foolish man if he waited until he had a wise thought to take pert in the buzzing with his neighbors.

Those who hate to pick up the weather as a conversational opening seem to me not to know the reason why human beings wish to talk. Very few human beings join in a conversation in the hope of learning anything new. Some of them are content if they are merely allowed to go on making a noise into other people’s ears, though they have nothing to tell them except that they have seen two or three new plays or that they had food in a Swiss hotel. At the end of an evening during which they have said nothing meaningful for a long time, they just prove themselves to be successful conversationists.

72. According to the author, people make conversation to _________.

A. exchange ideas                                      B. prove their value

C. achieve success in life                                   D. overcome their fear of silence

73. By “the buzzing of a fly” (Para. 1),the author means “_________”.

A. the noise of an insect                             B. a low whispering sound

C. meaningless talks                                         D. the voice of a chatterbox

74. According to the passage, people usually talk to their neighbors _________.

A. about whatever they have prepared         B. about whatever they want to

C. in the hope of learning something new    D. in the hope of getting on well

75. What is the author’s purpose in writing the passage?

A. To discuss why people like talking about weather

B. To encourage people to join in conversations

C. To persuade people to stop making noises

D. To explain why people keep talking

题型:单项选择题

认真贯彻落实党的十八界四中全会精神,需要()。

A、深入开展法治宣传教育

B、传播法律知识

C、弘扬法治精神

D、在全社会形成宪法至上、守法光荣的良好氛围

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