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【判断题】
双排辛普森式行星齿轮机构能够实现4个前进挡( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】There has not been a great response to the sale, ______?
A.
does there
B.
hasn't it
C.
hasn't there
D.
has there
【判断题】在一个测站水准测量过程中，如果读完后视水准尺后，转到前视水准尺时，发现圆水准气泡不居中，此时可以稍微调节脚螺旋，使圆气泡居中，接着再调微倾螺旋，使水准管器泡符合，最后读取前视读数。（ ）
A.
正确
B.
错误
【简答题】Who will be the w______ of the hasn’t been known.
【单选题】I’m sorry you can’t go in now. The room _______ yet.
A.
hasn’t been cleaned
B.
hasn’t cleaned
C.
isn’t been cleaned
D.
hasn’t being cleaned
【单选题】—Do you know the result of the competition? —No. It _____. [ ]
A.
hasn't announced
B.
hasn't been announced
C.
didn't announce
D.
wasn't announced
【单选题】After such a storm I’m surprised that the river __________.
A.
hasn’t flooded
B.
hasn’t been flooded
C.
wasn’t flooded
D.
hadn’t been flooded
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