若A(2，m)与B(n，-3)关于原点对称，则m·n=（ ）。

本案一审法院决定适用简易程序是否正确原因是什么

What a pity! ________joined in the party, I would have met my old friend．

A．lf I have

B．Had I

C．I had

D．Have I

单词拼写.

1. His sister is _______ (中等的) build.

2. My friend has _______ (卷曲的) hair.

3. That box is too _______ (重的), I can't carry it.

4. Is this _______ (流行的) music?

5. I'd like _______ (西红柿) noodles.

6. The _______ (马铃薯) are very delicious (美味的).

7. It's time for class, stop _______ (说话), please.

8. He likes _______ (读书) after dinner.

9. The pop singer has a new and cool _______ (形象).

10. She often _______ (戴) glasses at school.

绞车司机操作处要有（）

A、灯光

B、照明

C、水源

D、油脂

腰穿可能出现的并发症有()

A.低颅压综合征

B.脑疝形成

C.原有脊髓症状加重

D.马尾神经损伤

E.腰髓损伤