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【判断题】

齿轮副的接触斑点面积不能少于30%-50%。

A.
正确
B.
错误
举报
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...

A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.

【单选题】南非蜱传斑点热是由下列哪一种立克次体引起的

A.
普氏立克次体
B.
澳大利亚立克次体
C.
战壕热立克次体
D.
康氏立克次体
E.
小蛛立克次体

【单选题】Finder岛斑点热是由下列哪种立克次体引起的().

A.
澳大利亚立克次体
B.
战壕热立克次体
C.
普氏立克次体
D.
R.honer立克次体
E.
小蛛立克次体