肺结核的主要传播途径是()
A.呼吸道传染
B.粪-口传染
C.血行传染
D.皮肤侵入
E.泌尿生殖系统侵入
参考答案:A
My grandma used to live in the country, but now she _______living in the city and likes the city life.
A.is used to
B.is used for
C.used to
D.uses to
设f(x)为连续函数,则=()。
A.A
B.B
C.C
D.D