【多选题】关于口腔修复学的发展趋势,以下正确的是( )
【单选题】Close the windows, so the dirt from the road won't come into the car.
A.
If the windows are open, the car won't stay clean.
B.
With the windows open, it will be too windy in the car.
C.
With the windows open, there will be too much noise from the traffic on the road.
【简答题】A.To stress the role of dirt. B.To introduce the history of dirt. C.To call attention to the er of dirt. D.To present the change of views on dirt.
【单选题】ground-in dirt
A.
dirt which is ground in the fingernails
B.
dirt which is grounded in the fingernails
C.
dirt which is grinded in the fingernails
【简答题】Getting rid of dirt, in the opinion of most people, is a good thing. However, the attitudes to dirt are always changing. In the early 16th century, people thought that dirt on the skin was a means to ...
【单选题】Dirt should not be allowed to contaminate a grease lubricant because the _____.
A.
dirt will cause corrosion of bearing
B.
bearings will leak oil excessively
C.
dirt is very abrasive when mixed with grease
D.
grease will become inflammable
【单选题】If a place is dirt poor, it is ______.
【单选题】16位输入的二进制编码器,其输出端有()位