在()条件下,勒纳指数等于0
A.垄断竞争
B.寡头垄断
C.完全垄断
D.完全竞争
参考答案:D
解析:在完全竞争条件下,价格等于边际成本,勒纳指数等于0
-What will today’s talk be about?
-In the lecture ______, the professor will tell us something about modern English usage.
A.following
B.followed
C.to follow
D.to be followed
下列哪种果树的耐荫性强。()
A、山楂
B、葡萄
C、桃