利用害虫的性外激素诱杀害虫是利用昆虫的()
A.趋光性
B.趋化性
C.趋湿性
D.趋温性
参考答案:B
长春附近的低丘是()和()两河的分水岭。
He talked about the books and people ________ interested them greatly in the school.[ ]
A. who
B. which
C. how
D. that