_____ students are there in your class? [ ]
A. How much
B. How many
C. How
D. What
答案:B
对各型癫痫都有一定疗效的药物是
A.乙琥胺B.苯妥英钠C.卡马西平D.丙戊酸钠E.苯巴比妥
牙周膜的厚度在不同的人和不同的牙是不同的
A.0.01~0.38mm
B.0.15~0.38mm
C.0.05~0.38mm
D.0.10~0.38mm
E.0.20~0.38mm