简述刺蛾类的防治方法.
参考答案:
(1)园林技术防治:(2)物理防治:(3)化学防治:(4)生物防治
一质点在X轴上运动,各个时刻的位置坐标如下表,则此质点开始运动后”
第几秒内位移最大?
A.1s B.2s C.3s D.4s
25. As soon as I got home, my father asked ______ with me.
A.what the matter was
B.how the matter was
C.how was the matter
D.what was the matter