单项选择题
She ______ study in peace. If she can't, she won't pass her exams. A．has to be able to B．would be able to C．can be able to D．may be able to
单项选择题 造成感觉神经性耳聋最主要的原因是( ) A．耳毒性药物中毒 B．先天性听觉障碍 C．外耳或中耳外伤 D．中耳炎 E．听神经瘤
单项选择题 与毛发的荣枯有关的物质是( ) A．精与气 B．精与液 C．精与血 D．津与气 E．气与血
单项选择题 糊化现象是指( )的变化。 A．蔗糖 B．葡萄糖 C．果糖 D．淀粉
