拓跋鲜卑

They didn’t know what I was talking about because they didn’t listen ___________.

A．clear

B．careful

C．hardly

D．carefully

网络世界中，实施政务公开，发布政务信息的最佳平台是（）

A.电话

B.门户网站

C.报纸

D.广播

用所给词的正确形式填空。

1. —Can you _________ (come) to my party on Wednesday?

   —Sorry, I have _________ (go) to the doctor.

2. —Can she go to the movies?

    —No, she _________ (not can). She's _________ (play) soccer.

3. She can't come to your party, she __________ (have) tennis

   __________ (train) with the school team.

4. Thanks a lot for your _________ (invite).

    Thank you for __________ (invite) me to your party.

5. She's _________ (babysit) her little sister, she can't come.

6. There _________ (be) a baseball match tomorrow afternoon in our school.

7. I'll ask my _________ (America) friends to come to my birthday party next week.

8. We are going to learn some new __________ (subject), such as physics, _________ (chemist).

9. He has __________ (something) to do. He is free.

10. I don't know ___________ (who) you'll go to the movie with this evening.

下列实验的设计可行的是（　　）

A．用澄清石灰水可区别Na₂CO₃和NaHCO₃粉末

B．

用图装置进行浓硝酸与铜的反应制取并收集NO₂

C．检验未知溶液是否含SO₄²ˉ可先加氯化钡，再加稀盐酸

D．除去粗盐中的Ca²⁺、Mg²⁺、SO₄^2-，依次加入的物质是H₂O、BaCl₂、Na₂CO₃、HCl

男性矿工，井下作业时发生塌方砸伤背部，当即倒于地上，腰背疼痛，下肢无力，活动困难，准备立即送医院。

如果伤后3个小时，病人双下肢感觉、运动逐渐恢复，其最可能是

A．脊髓断裂

B．脊髓出血

C．脊髓震荡

D．脊髓挫伤

E．脊髓受压