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【判断题】

高压和超高压水喷射不会再光滑表面产生表面粗糙度。

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

【单选题】In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civilization from the faces...

A.
any way, the face-recognition technology is good enough to frighten the terrorists
B.
the industry will have to recognize the real situation and work hard to improve the technology
C.
all the claims are premature
D.
we must not expect too much

【单选题】Passage 4 In the wake of 11 September, Visionics, a leading manufacturer, issued a fact sheet explaining how its technology could enhance airport security. They called it "protecting civ...

A.
Too many false alarms were raised.
B.
Everyone should look straight at the camera.
C.
Only 90% of suspects at an airport were found.
D.
Everyone should not disguise himself.

【单选题】我国常用机械零件推荐优先选用的表面粗糙度Ra为()。

A.
微观不平度10点高度平均值
B.
轮廓最大高度值
C.
微观不平度均方值
D.
轮廓算术平均偏差值