亚急性感染性心内膜炎的特征是()。
A.中毒症状轻
B.病程数周至数月
C.感染迁移少见
D.病原体主要为金黄色葡萄球菌
E.病原体主要为草绿色链球菌
参考答案:A, B, C, E
---Huck, how old is your mother this year?
--- . And we had a party for her birthday last weekend.
A.Fortieth, forty
B.Forty, forty
C.Forty, fortieth
D.fortieth, fortieth
It is not far _____ his home. [ ]
A. to
B. from
C. with
D. and