某同学拟在一个面积为100hm2草地上调查研究某种双子叶草本植物的种群密度，设计

句型转换。

1. She bought some clothes from the shop.(改为同义句)

She _____ _____ _____ in the shop.

2. The bad news surprised me a lot.(改为同义句)

I was _____ _____ the bad news very much.

3. I saw the boys were playing ping-pong happily.(改为同义句)

I saw the boys _____ ping-pong happily.

4. He chatted with his friends on line.(用at this time yesterday改写)

He _____ _____with his friends on line at this time yesterday.

5. The alien was very awful.(改为感叹句)

_____ _____ awful alien it was!

我国机构改革的取得的成效有（）。

A.机构和人员膨胀得到有效的抑制

B.机构精简并重构

C.政府职能发生了一定程度的转变

D.政府管理体制和运行方式创新力度加大

作为一名造球工，你如何提高造球质量和粒度，确保竖炉生产稳定顺行？

预防维修（PrM）的含义是什么？

某钢筋混凝土梁的主筋直径是20mm，箍筋为Φ8@120，则箍筋弯钩增加长度应为（）。

A.100mm

B.120mm

C.140mm

D.160mm