肺转移性肝癌指的是()
A.肺癌转移至肝
B.肝癌转移至肺
C.肝癌和肺癌同时转移至其他处
D.其他处的癌转移至肝和肺
E.肝癌和肺癌互相转移
参考答案:B
沙氏住白细胞虫的传播媒介为()
A.蠓
B.蚋
C.虻
D.蚊
E.蝇
—There is a lot of wind in North China.
—Well, more trees ______ every year to stop the wind. [ ]
A. must be planted
B. can planted
C. should planted