啤酒花出土后，一部分叶螨便迁入到啤酒花植株上繁殖危害。春季干旱少雨，气温高，则发生早，危害重。
参考答案：对
若x=-3是方程3（x-a）=7的解，则a=______．
was your last weekend? It was not bad. [ ]
A. How about
B. How
C. What
D. What about
