光同步传输网的主要传输损伤包括()、()和()。

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问题:

光同步传输网的主要传输损伤包括()、()和()。

考点:代维资格考试移动代维移动代维题库
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设f(x)=lg
1+2x+4xa
3
,如果当x∈(-∞,1]时f(x)有意义,求实数a的取值范围.
题型:填空题

TWO-WAY VHF必须具备()信道。

A.6

B.16

C.13

D.70

题型:填空题

用括号内所给动词的适当形式填空。

小题1:---Did Tom enjoy seeing his old friends yesterday ?

---Yes, he did. He _____________ ( not meet ) his old friends for a long time.

小题2:The detective promised to the victim that he              (catch) the robber as soon as possible.

小题3:---Do you know the places of interest in Wuxi ?

---Yes, it is the second time I ___________ (visit ) the beautiful city.

小题4:He seemed to have difficulty _______________ (control) his actions.

小题5:Would you please ________ (not disturb) him when he is reading English.

小题6:While I was watching a football match on TV, my twin brother _______________ (pack) for the next day’s trip to Qingdao.

小题7:The sports meeting they were looking forward to __________ ( hold) yesterday.

小题8:As science ________(progress) quickly, our modern life becomes more and more colourful.

题型:填空题
取两块表面磨平、干净的铅块,让它们紧密接触,铅块就能结合在一起,在它的下面还可以挂一个重物.这个实验主要说明(  )

A.物质是由分子组成的

B.分子间存在着相互作用的引力

C.分子间存在着相互作用的斥力

D.分子在不停地做无规则的运动

题型:填空题

建设中国特色社会主义经济,必须坚持和完善的基本经济制度是 [ ]

A.单一的社会主义公有制    

B.巩固和发展混合所有制经济

C.以公有制为主体,多种所有制经济共同发展

D.以非公有制为主体,大力发展个体私营经济

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