沥青路面产生纵向长裂缝是由于（）引起。
A．沥青含量过多
B．沥青含量过少
C．路基开裂
D．基层厚度不足
参考答案：C
A
小题1: The people in needn’t go to work on Fridays.
A．Canada
B．Scotland
C．Japan
D．Egypt小题2: If it is 8:00 a.m. in western Canada, the time is _______ in eastern Canada.
A．11:00a.m
B．2:00 p.m.
C．12:30 p.m.
D．4:00 a.m.小题3:While Canadian children are waking up, children in Scotland are ________.
A．having lessons
B．sleeping
C．watching TV
D．playing games
聚丙烯酰胺装置生产不需要（）。
A、电
B、氮气
C、蒸汽
D、导热油
