公路运输中货物高度规定，重型、中型和半挂车载物，从地面起不超过( )。
A．3.8米B．4米C．4.2米D．4.5米
参考答案：B
His efforts to raise money for his program were _____ because no one showed any intention to
take a cent out of their pockets. [ ]
A. in place
B. in sight
C. in effect
D. in vain
什么是汽车自动空调？使用自动空调的目的是什么？
