介导细菌间接合的物质是()
A.鞭毛
B.普通菌毛
C.性菌毛
D.中介体
E.核糖体
参考答案:C
After suffering a heart attack, Michael Jackson was pronounced dead, ____ a tragic end to the world' s
most popular entertainer.
A. to mark
B. marking
C. marked
D. having marked
I go to a restaurant to _________ ice cream.[ ]
A. eat
B. drink