现有三组溶液:①汽油和氯化钠溶液 ②39%的乙醇溶液 ③氯化钠和单质溴的水溶液,

题型:选择题

问题:

现有三组溶液:①汽油和氯化钠溶液 ②39%的乙醇溶液 ③氯化钠和单质溴的水溶液,分离以上各混合液的正确方法依次是[ ]

A.分液、蒸馏、萃取  

B.萃取、蒸发、分液

C.分液、萃取、蒸馏  

D.蒸馏、萃取、分液

考点:物质的分离
题型:选择题

根据语境选择句子。

1. 你想跟别人一起去,但你又必须做家庭作业,你该如何告诉别人呢?[ ]

A. No, I can't. I must do my homework.

B. I'd like to, but I must do my homework.

C. I'm sorry, I can do my homework.

2. 你想邀请别人和你一起放风筝,该如何说?[ ]

A. Do you like to fly a kite?

B. Would you like fly a kite?

C. Would you like to fly a kite with me?

3. 你想问朋友喜欢吃什么,该怎么说?[ ]

A. What would you want to drink?

B. What would you like?

C. What can I do for you?

4. 你想问别人需要什么,该如何说?[ ]

A. What do you need?

B. What do you want to do?

C. What would you like to eat?

5. 你想拿菜单点菜,该怎样对服务员说?[ ]

A. May I have the menu?

B. I'd like some bread.

C. Shall I have some eggs?

6. 当你想知道别人是什么地方的人时,你说:[ ]

A. Where are you from?

B. Do you live far from here?

C. Why do you come here?

7. 你的同学口渴了,你给他一杯水,可以说:[ ]

A. Here's some water for you.

B. I know you are thirsty.

C. Take this cup of water.

8. 你告诉妈妈李明的个子比你高时,说:[ ]

A. Li Ming is a tall boy.

B. Ming is taller than me.

C. Li Ming is as tall as me.

9. 你想知道别人是否有空,可以说:[ ]

A. Please help me.

B. Do you have nothing to do?

C. Are you free now?

10. 当你得知北方的天气转冷,你对准备去北方的朋友说:[ ]

A. You should take some warm clothes.

B. It's very cold. Don't go to the north.

C. Drink some hot tea, please.

11. 你想要一杯茶时,应该说:[ ]

A. I'd like a cup of tea.

B. Would you like a glass of tea?

C. May I have a bottle of tea?

12. 当你想知道新电视机的颜色时,应该问:[ ]

A. Where is the new TV?

B. What's a TV?

C. What colour is the new TV?

13. 当你想知道别人是否有钢琴时,应该问:[ ]

A. Have you got a dictionary?

B. Have you got. a piano?

C. May I use your piano?

14. 当你想了解别人是否喜欢游泳时,应该问:[ ]

A. Do you like swimming?

B. Do you like running?

C. Do you like ping-pong?

15. 当你想知道这些物品是谁的时,应该问:[ ]

A. Whose are these?

B. Whose are those?

C. Who are they? 

题型:选择题

肥胖病的病位在()

A.心

B.脾

C.肺

D.肌肉

E.肾

题型:选择题

In my daily life I      ignore work , study , and other activities to check my phone for messages.

A.fluently

B.frequently

C.immediately

D.practically

题型:选择题

13A型车钩钩舌销制造标记有()。

A.制造厂代号

B.产品顺序号

C.型号

D.制造年月

题型:选择题

焦油加工的主要任务是获得酚、萘、蒽等纯产品和()等粗产品。

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