在大型活动中，病媒生物的主要风险有（）。A、传播疾病 B、叮咬、骚扰 C、啃咬电缆

单词拼写。

1. It took a long time for him to______ (恢复) from a bad cold.

2. Don't always stay indoors. You'd better go ______ (户外) for fun time. 

3. At the beginning, I _______ (不同意) with his advice, but later I changed my mind. 

4. ______ (实际上) he is a shy boy who talks little.

5. Black people couldn't ______ (投票) in the past.

6. All countries, big and small, should be ______ (平等的). 

7. A great person is someone who _______ (献身) his life to helping others. 

8. What kind of transport do you _______ (更喜欢) to use: bus or train?

9. James was _______ (心烦的) because he had lost his ticket.

10. It was hard to _______ (使平静) down the football fans.

11. Everyone can greatly improve the _______ (质量)of life if a right attitude is taken. 

12. Half of them died or were_______ (受伤) during the earthquake.

13. Though many Americans move a lot, they still _______ (辨认出) and understand each other's dialects.

14. She saw him coming but she tried to_______ (不理睬) him.

下列为小萍同学在实验室制取CO₂并检验CO₂性质的实验装置示意图（浓HCl有挥发性，2HCl+Ca(OH)₂===CaCl₂+2H₂O），试回答：

（1）仪器的名称：a                  ；

（2）用化学方程式表示实验室制取CO₂的反应原理                            

（3）该同学在实验过程中，将A中产生的气体通入到B中，观察澄清石灰水的变化                （填浑浊或不浑浊），试分析其原因                                           。

（4）该同学用C瓶收集满一瓶由装置A中产生的气体后，往瓶中倒入浓氢氧化钠溶液，迅速用事先绑好一个小气球的胶塞塞紧，震荡，可以观察到小气球逐渐胀大，其原因是                            ，请写出C中反应的化学方程式                                                    。

北宋时重要的瓷器产地是景德镇和定窑。( )

招标人与中标人应当自发出中标通知书之日起( )日内，依据中标通知书、招标投标文件中的合同构成文件签订合同协议书。

A．7
B．15
C．30
D．45

关于混悬型注射剂叙述正确的是（）

A.颗粒大小要适宜

B.一般可供肌内注射及静脉注射

C.不可以是油混悬液

D.不得有肉眼可见的混浊

E.贮存过程中可以结块