交互抑制属于（）抑制。
A、突触前
B、突触后
C、回返性
参考答案：A
Low-carbon lifestyle is of great benefit to improve the world environment, but the problem is difficult to _________．
A．solve
B．be solved
C．solve with
D．solving
一年当中，防治果树卷叶蛾应以（）为重点。
A.越冬代
B.第1代
C.第2代
D.第3代
