旅客列车出库前，应进行持续一定时间的简略试验。
参考答案：错
—How about Tomin school?
—He is always working harder than .[ ]
A. any students
B. all the students
C. anyone else
D. every student
企业订立的借款合同和财产抵押合同应缴纳印花税( )元。
A．20
B．40
C．200
D．400
