既能涌吐痰涎,又能截疟的药物是()
A.槟榔
B.青蒿
C.常山
D.生首乌
E.胆矾
参考答案:C
尼可刹米在pH值为何值时,水解速度最小
A.1B.4~5C.7D.8~10E.14
(2011·北京,31)The shocking news made me realize ________ terrible problems we would face.
A.what
B.how
C.that
D.why