自动相关监视的英文缩写是()。A.ADS B.SSR C.ASSR D.DME

题型:单项选择题

问题:

自动相关监视的英文缩写是()。

A.ADS

B.SSR

C.ASSR

D.DME

考点:甚高频通信系统VHF考试甚高频通信系统VHF考试题库
题型:单项选择题

冷却塔的空气吸入口和墙壁等之间的距离,三槽型为()m。

A、2

B、2.5

C、3.5

D、5

题型:单项选择题

图为“我国某城市及周边地区示意图”(海拔单位m),读图回答下列问题。

小题1:该市最可能位于

A.四川

B.青海

C.山东

D.广西小题2:如果考虑规划建高科技园区,最合理的地点是

A.①

B.②

C.③

D.④

题型:单项选择题

阅读理解。

     Modern inventions have speeded up people's lives amazingly. Motor-cars cover a hundred

miles in little more than an hour, aircraft cross the world a day, while computers operate at

lightning speed. Indeed, this love of speed seems never-ending. Every year motor-cars are

produced which go even faster and each new computer boasts (吹嘘) of saving precious

seconds in handling tasks.

     All this saves time, but at a price. When we lose or gain half a day in speeding across the

world in an airplane, our bodies tell us so. We get the uncomfortable feeling known as jet-lag;

our bodies feel that they have been left behind in another time zone. Again, spending too long at

computers results in painful wrists and fingers. Mobile phones also have their danger, according

to some scientists; too much use may transmit harmful radiation into our brains, a consequence

we do not like to think about.

     However, what do we do with the time we have saved? Certainly not relax, or so it seems.

We are so accustomed to constant activity that we find it difficult to sit and do nothing, or even

just one thing at a time. Perhaps the days are long gone when we might listen quietly to a story

on the radio, letting imaginations take us into another world.

     There was a time when some people's lives were devoted simply to the cultivation of the land

or the care of cattle. No multi-tasking there; their lives went on at a much gentler pace, and in a

familiar pattern. There is much that we might envy about a way of life like this. Yet before we

do so, we must think of the hard tasks our ancestors faced; they farmed with bare hands, often

lived close to hunger, and had to fashion tools from wood and stone. Modem machinery has

freed people from that primitive existence.

1. The new products become more and more time-saving because ______.

A. time is limited

B. the manufacturers boast a lot

C. the prices are increasingly high

D. our love on speed seems never-ending

2. What does "the days" in Paragraph 3 refer to?

A. Imaginary life.

B. Times of inventions.

C. Simple life in the past.

D. Time for constant activity.

3. What is the author's attitude towards the modern technology?

A. Critical.

B. Objective.

C. Optimistic.

D. Negative.

4. What does the passage mainly discuss?

A. The present and past times.

B. Machinery and human beings.

C. Imaginations and inventions.

D. Modern technology and its influence.

题型:单项选择题

采样点的设置要有代表性,采到的浮游生物要能真正代表一个水体或一个水体()的实际状况。在江河中采集浮游生物时,采样点应设在()附近及其()设点,以反映受污染和未受污染的状况。

题型:单项选择题

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