支气管扩张
A.平扫B.增强扫描C.灌注扫描D.高分辨率扫描E.薄层扫描
参考答案:D
— Lisa hasn't lived here for long. She _____ know many people.
A.needn’t
B.can’t
C.shouldn’t
D.didn’t
下列物质,各取少量分别放到水中,充分搅拌,不能得到溶液的是( )
A.醋酸
B.酒精
C.汽油
D.蔗糖