作物栽培制度其内容主要包括()。
A、复种
B、间作
C、混作
D、套作
E、轮作
参考答案:A, B, C, D, E
The site ______ now is a park, which will be open to the public at the end of this year.
A.to be built
B.being built
C.having been built
D.Built
蹲位最适用于检查()
A.直肠息肉
B.直肠脱出
C.前列腺
D.内痔
E.盆腔病变