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【单选题】
检查传动带的挠度时,发电机传动皮带的张力应调整合适。既不能过松,也不能过紧。调整时,在发电机带轮和风扇带轮中间用 30~50N的力按下带,下降( )。A.
5~10mm
B.
10~15mm
C.
15~20mm
D.
0.20~0.25
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举一反三
【单选题】What can we learn from the first paragraph?
A.
It is a natural tendency for people to believe that innovation is stimulated by patents.
B.
The inventors cannot reap the fruits of their patents until many years later.
C.
Individuals and organizations welcome competitions brought about by the patentees.
D.
Patenting can never be a blessing to society if it fails to benefit people at large.
【简答题】Yi people
【简答题】单词拼写。 1. In the Torch Festival, the Yi people danced in their national c_____. 2. The black people were no longer bought and sold as slaves after the slave trade was a_____. 3. The lazy guy w_____ aro...
【简答题】任务型阅读。 Many people love drinking bottled (瓶装的) water because of the convenience. They believe that it is better to drink bottled water than to drink water out of the tap. However, all those bottles ar...
【简答题】简述可用性的特点?
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