既可燥湿健脾，又能祛风散寒的药物是（）
A.藿香
B.佩兰
C.苍术
D.独活
E.白术
参考答案：C
Sally is only 6 years old, so she can't _____ herself. [ ]
A. look at
B. look over
C. look after
D. look out
当列车管减压量为100kPa时，LN型制动机的制动缸表压力为（）。
A.86.4kPa
B.190kPa
C.225kPa
D.542kPa
