变异型心绞痛最好选用哪一种药物
A.普萘洛尔B.吲哚洛尔C.硝苯地平D.硝酸异山梨酯E.洛伐他汀
参考答案:C
If better use is ____ your spare time , you will make greater progress.
A.used for
B.spent
C.made of
D.taken
黄土高原水土流失自然因素是
①夏季多暴雨②黄土土质疏松③植被覆盖率低④春季多大风⑤本区地形起伏大⑥全年降水丰沛[ ]
A.①②⑥
B.②③⑤
C.①②③⑤
D.⑤⑥