He didn't come to school ______ his illness. [ ]
A. because
B. because of
C. so
D. why
答案:B
正常人中心静脉压测定值为
A.50~100mmH2O B.60~100mmH2O C.50~120mmH20D.60~120mmH2O E.60~140mmH2O
由病原体引起的并能在生物体之间传播的疾病叫做传染病.下列各组疾病中,属于传染病的是( )
A.肺结核与乙肝
B.近视眼与色盲
C.坏血病与肿瘤
D.高血压与贫血