单项选择题
鼻咽癌一般不侵犯( ) A．颅内 B．中耳 C．口腔 D．鼻腔 E．眼眶
单项选择题 食物的基本味中，（）为“百味之王”。
问答题 试比较顺铣和逆铣的优缺点。
单项选择题 She ______ study in peace. If she cant, she wont pass her exams. A．has to be able to B．would be able to C．can be able to D．may be able to
