振动压路机作业时,压路机应先起振后才能起步,内燃机应先置于中速,然后再调至高速。()
参考答案:错
It rained that day and ________ the basketball game was called off.
A.however
B.still
C.though
D.consequently
二氧化碳灭火系统按应用方式可分为()和()。