缩短童期措施?
参考答案:
最主要是提供良好的环境条件和提高管理水平,促进营养积累并使之合理分配,以加速植株生长发育,促进代谢物质及激素在体内的平衡以促进性成熟过程。
Henry broke the window .I’ll ask him why __________ .
A.did he do that
B.he did that
C.had he done that
D.he had done that
诗句“春蚕到死丝方尽,…”,诗中的“丝”指的是( )
A.纤维素
B.蛋白质
C.淀粉
D.糖类