可产生菌血症的细菌是（）
A.志贺菌
B.白喉棒状杆菌
C.肉毒梭菌
D.破伤风梭菌
E.伤寒沙门菌
参考答案：E
—What are you doing?
—I am helping her _____ that book. [ ]
A. finding
B. look for
C. looking for
D. find
)
