精度为1.5级的压力表,其允许误差为压力表表盘刻度极限值的1.5%。

题型:判断题

问题:

精度为1.5级的压力表,其允许误差为压力表表盘刻度极限值的1.5%。

考点:常减压装置考试高级常减压装置高级常减压装置题库
题型:判断题

The sunlight goes_____the window.

A.through

B.at

C.along

D.across.

题型:判断题

()年5月3日,以“国际体育舞蹈俱乐部”为前身的“中国体育舞蹈运动协会”宣告成立。

A.1989

B.1990

C.1991

D.1993

题型:判断题

工程设计变更不论由谁提出,都必须征得()同意并且办理设计变更手续。

A.施工单位

B.建设单位

C.监理单位

D.设计单位

题型:判断题

机场区域分为(),并分别实施相应的保安措施。

A.对外开放区

B.办公区

C.隔离区

D.控制区

题型:判断题

It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advance. You cannot make choices in this matter. (46)You either have science or you don’t, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful bits.

The only solid piece of scientific troth about which I feel totally confident is that we are profoundly ignorant about nature. Indeed, I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. (47)It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we know and how bewildering the way ahead seems. (48)It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply made up stories to fill the gaps. Now that we have begun exploring in earnest, we are getting glimpses of how huge the questions are, and how far from being answered. Because of this, we are depressed. (49)It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad sports, but not true light at the end of the tunnel nor even any tunnels that can yet be trusted.

But we are making a beginning and there ought to be some satisfaction. There are probably no questions we can think up that can’t be answered, sooner or later, including even the matter of consciousness. (50)To be sure, there may well be questions we can’t think up, ever, and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers if we keep at it long enough, and pay attention.

(50)To be sure, there may well be questions we can’t think up, ever, and therefore limits to the reach of human intellect, but that is another matter.

更多题库