宜用中火炮制的药物是（）
A.盐炙知母
B.盐炙杜仲
C.蜜炙甘草
D.醋炙柴胡
E.盐炙补骨脂
参考答案：B
在4220Ca中所含的质子数是（ ）
A．20
B．22
C．42
D．62
Big efforts have been made to __________ government expenses to a desirable level.
A．cut down
B．cut up
C．cut in
D．cut off
