治疗肺炎球菌性肺炎应首选（）
A.氨苄青霉素
B.苯唑青霉素
C.头孢唑啉
D.头孢哌酮
E.青霉素G
参考答案：E
标准煤样有哪些用途？
The poor little boy________by his heartless parents was seen begging in the street.
A．abandoning
B．to be abandoned
C．having abandoned
D．abandoned
