解方程：（1）2（10-0.5y）=-（1.5y+2）；（2）1-2x3=3x+

根据英文解释选择相应的动物。

             A                              B                                  C

                     D                         E

1. It is named Hooy. He is ten years old.  He is from Africa. He likes playing with water and eating grass.

2. This is Kall.  Isn't he clever? He is from Australia. He sleeps during the day, but he usually eats leaves at

     night.

3. This is Lingling. She's five years old. She is black and white. She's from China. She's very cute, but she's

     very shy.

4. They live and hunt in groups and like eating meat very much.

5. He is tall with a very long neck, long legs, and dark marks (斑点).

3米4厘米=______米9千米700米=______米．

试述我国华北板块晚生代地史特征（以山西太原剖面为例）

天然气灶具灶前额定燃气供气压力为2000Pa，约等于多少毫米水柱（H₂0mm）？

离心泵电流突然超高是什么原因？