《客车运用限度表》中规定，踏面擦伤及局部凹入深度本属出库≤（）mm。
A.0.5
B.1
C.1.5
D.2
参考答案：A
Deng Yaping went to Tsinghua University and __________ English and management.
A. majored in B. majored for C. major in
When fighting a fire with a portable dry chemical fire extinguisher，the stream should be directed（）.
A.over the top of the flames
B.off a bulkhead into the fire
C.in front of the fire
D.at the base of the fire
