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【单选题】
若螺纹的直径和螺旋副的摩擦系数一定,则拧紧螺母时的效率取决于螺纹的 。A.
螺距和牙形角
B.
升角和头数
C.
导角
D.
螺距和升角
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举一反三
【简答题】If the sentence is true, COPY it! If the sentence is false, write down the CORRECT statement!
【单选题】What does the sentence 'If it is not yet speeding discoveries, it is certainly accelerating communication' most probably mean?
A.
The quick speed of correspondence may have ill effects on discoveries.
B.
Although it does not speed up correspondence, it helps make discoveries.
C.
It quickens mutual communication even if it does not accelerate discoveries.
D.
It shrinks time for communication and accelerates discoveries.
【单选题】In the last paragraph．the sentence“It is the gardens that seem to be the focal point of the nome means_______．
A.
The garden is very small，but beautiful
B.
The garden is very big and beautiful
C.
When people visit his home，they like to visit the garden most
D.
People like to take pictures in his garden
【单选题】在LTE中模三干扰是一种常见的干扰现象,判断模三干扰方法正确的是()
A.
两个小区有重叠覆盖的区域,扰码乘以3相等就是
B.
两个小区有重叠覆盖的区域,扰码加3相等就是
C.
两个小区有重叠覆盖的区域,扰码除以3取余,余数相等就是
D.
两个小区有重叠覆盖的区域,扰码减3相等就是
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