台车行走时,其轮胎气压不得低于()
参考答案:4.5kg/cm
Helen was so excited at the news that she could say a word.
A.ever
B.almost
C.hardly
D.always
我国最东端、最北端所在省区是[ ]
A、黑龙江
B、内蒙古、黑龙江
C、黑龙江、辽宁
D、新疆、黑龙江