Mary has few friends in Japan,______ she? [ ]
A. does
B. don't
C. doesn't
D. hasn't
A
与原发性高血压无关的因素是()
A.体重超重和肥胖
B.饮酒
C.高钠盐饮食
D.遗传
E.肾脏实质病变
某患者上下前牙切端垂直向间隙在3~5mm之间,应诊断为()。
A.牙列拥挤Ⅱ度
B.Ⅱ度深覆
C.Ⅰ度深覆盖
D.Ⅱ度开
E.Ⅲ度开