Cathy said she speak four languages.[ ]
A. may
B. could
C. would
D. can
答案:B
地质勘探点一级勘探场地的勘察间距是10~15m。
最易引起房颤的疾病是()
A.风湿性心脏病二尖瓣狭窄
B.冠心病
C.甲状腺功能亢进性心脏病
D.高血压性心脏病
E.缩窄性心包炎