双联齿轮的基准是花键孔轴线，花键是以外径定心的，所以花键孔是其它各表面加工的定位基准，也是装配基准。( )
参考答案：错
硫脲类降糖药物中最易引起严重低血糖的是
A．甲苯碘丁脲
B．格列本脲
C．格列吡嗪
D．格列奎酮
E．格列齐特
用单词适当形式填空。
1．I can't work the whole day so I should find a ___________ (兼职的) job.
2．While the little boy was walking down the street, the UFO ___________ (着陆).
3．Don't talk loudly. My father is sleeping in his ___________ (卧室).
4．The man fell off his bike and got ___________ (受伤的).
5．Don't ___________ (抄袭) your classmates' homework.
