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【单选题】
是谁合成了第一个有机化合物尿素A.
乌斯
B.
维勒
C.
D.
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反馈参考答案：
举一反三
【单选题】When engineering drawings are made, the recommanded font for writting numarals and letters is .
A.
text
B.
isocp
C.
fangsong
【单选题】_____ more careful, his ship would not have sunk.
A.
If the captain were
B.
Had the captain been
C.
Should the captain be
D.
If the captain would have been
【单选题】Captain, My Captain is written for______.
A.
Lincoln
B.
Whitman
C.
Washington
D.
Hemmingway
【单选题】The captain is from canada.
A.
The captain is Brazilian
B.
The captain is Canadian
C.
The captain is American
D.
The captain is Australian
【多选题】When engineering drawings are made, the line types which should be set beforehand include .
A.
Thick solid line
B.
Thin solid line
C.
Center line
D.
Dashed line
【简答题】Sketch
and identify the three methods of representing threads on engineering drawings.
【单选题】关于汽车电路的特点,下面说法不完全正确的是
A.
奥迪车辆上的大多数用电设备都采用直流供电，这就要求汽车上的电源采用方向和大小不随时间变化的直流电
B.
奥迪汽车上的电压均采用12V直流电压
C.
汽车上的各种电器设备都采用并联连接，各部件的控制有开关或控制单元独立完成
D.
因为汽车的金属车身可用做导体，因此将车身与蓄电池的负极连接后即可作为负极使用
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