106+994+1008+9992=( )。
A.12000
B.12100
C.12310
D.12116
参考答案:B
解析: 原式=1100+11000=12100
. —Did you get there by ______ bike?
—No, I took ______ taxi.
A.a; a
B.不填; a
C.the; the
D.a; the
治疗梅毒和钩端螺旋体病的首选药是()
A.庆大霉素
B.红霉素
C.四环素
D.青霉素G
E.氯霉素