高压电缆从杆上引下时,保护管的卡子应采用两个,其间距为()mm。

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问题:

高压电缆从杆上引下时,保护管的卡子应采用两个,其间距为()mm。

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竖式计算:
77÷685÷569÷3324×4707×4620×8.
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准确检查胎儿心脏有无异常的方法为()。
对胎儿危险性最大的检查手段为()。
最常应用的侵袭性产前诊断技术为()。

A.绒毛活检术

B.超声影像检查

C.羊膜腔穿刺术

D.脐带血穿刺术

E.孕妇外周血分离胎儿细胞

题型:填空题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words.
In (36) a job or advancing in one, the ability to read and comprehend (37) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (38) readers.
Most of us develop poor reading (39) at an early age, and never get over them. The main deficiency (40) in the actual stuff of language itself—words. Taken individually, words have (41) meaning until they are strung together into phrases, sentences and para-graphs. (42) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (43) words or passages.
Regression, the tendency to look back over (44) you have just read, is a common bad habit in reading. Another habit which (45) down the speed of reading is vocalization—sounding each word either orally or mentally as (46) reads. To overcome these bad habits, some reading clinics use a device called an (47) , which moves a bar (or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (48) the reader finds comfortable, in order to "stretch" him.
The accelerator forces the reader to read fast, (49) word-by-word reading, regression and sub vocalization, practically impossible. At first (50) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (51) your comprehension will improve.
Many people have found (52) reading skill drastically improved after some training. (53) Charlce Au, a business manager, for instance, his reading rate was a reasonably good 172 words a minute (54) the training, now it is an excellent 1,378 words a minute. He is delighted that how he can (55) a lot more reading material in a short period of time.

[A] what[B] which [C] that[D] if

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钱学森很注意捕捉灵感,发挥灵感的神奇作用。他认为,灵感的出现常常带给人们渴望已久的智慧之光。下列关于灵感的认识,正确的是()

A、灵感的捕捉是以合理想象为基础的

B、外因是获得灵感的决定性因素

C、捕捉灵感必须充分发挥人的主观能动性

D、思维创新是灵感的源泉

题型:填空题

四余度电传系统能够实现的故障安全等级是().

A.故障/安全

B.双故障/安全

C.三故障/安全

D.四故障/安全

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