顶芽对侧芽的生长有抑制作用，主茎生长旺盛时，（）往往缓慢或不能萌发抽枝。
参考答案：侧芽
棉种入库前，一定要保持种子干燥，适宜的种子含水量为()%。
I'm sure I ___in a certain key university at this time next year．
A．am studying
B．will have studied
C．will be studying
D．will study
