永久性避孕的方式为（）。
A.吸宫术
B.绝育术
C.使用避孕套
D.口服避孕药
E.放置宫内节育器
参考答案：B
There is no doubt that students ________in their study if they more praise from their teachers.
A．will make progress; will get
B．make progress; get
C．will make progress; get
D．make progress; will get
包衣过程应选择的材料
隔离层
A．丙烯酸树脂Ⅱ号B．羟丙基甲基纤维素C．虫胶D．滑石粉E．川蜡
