乙烷和乙炔混合物共m mol，与n mol的氧气点燃后完全反应，得到CO和CO2

句型转换。

1. We keep in touch with each other by email. (改为否定句)

    We _____ _____ in touch with each other by email.

2. Our school organizes an English speech contest once a year. (对画线部分提分)

    _____ _____ does your school organize an English speech contest?

3. The beach is a nice place for tourists. (改为感叹句)

    _____ _____ nice place the beach is for tourists!

4. Are there any new markets in Asia? The sales manager wants to know. (合并为一句)

   The sales manager wants to know _____ there _____ any new markets in Asia.

5. The university will invite many graduates to celebrate its 100th birthday. (改为被动语态)

    Many graduates will _____ _____ by the university to celebrate its 100th birthday.

6. We shouldn't talk loudly in the theater. We shouldn't smoke there, either. (保持句意不变)

    We should _____ talk loudly _____ smoke in the theater.

2011年7月5日，某公司高经理与员工在饭店喝酒聚餐后表示：别开车了，“酒驾”已入刑，咱把车推回去。随后，高经理在车内掌控方向盘，其他人推车缓行。记者从交警部门了解到，如机动车未发动，只操纵方向盘，由人力或其他车辆牵引，不属于酒后驾车。但交警部门指出，路上推车既会造成后方车辆行驶障碍，也会构成对推车人的安全威胁，建议酒后将车置于安全地点，或找人代驾。鉴于我国对“酒后代驾”缺乏明确规定，高经理起草了一份《酒后代驾服务规则》，包括总则、代驾人、被代驾人、权利与义务、代为驾驶服务合同、法律责任等共六章二十一条邮寄给国家立法机关。

关于高经理和公司员工拒绝“酒驾”所体现的法的作用，下列说法正确的是：

A．法的指引作用

B．法的评价作用

C．法的预测作用

D．法的强制作用

()信息提取真实性原则是零售许可信息档案建立的基本原则之一。

根据汉语意思完成句子，每空一词

1．这块蛋糕是用黄油和面粉做的。  

The cake_______ ______ _______butter and flour

2．我认为他的答案不对。  

_______ ______ _______his answer is right

3．我写完作业了。你呢，杰克？  

I have finished my homework, _______ ______ ______    , Jack?

4．第二天复习你之前所学的知识，效果会更好。

________ ________ _______ ________review what you learnt thefollowing day.

5．这本书是他写的。  

This book_______ ______ ______him.

6．树被砍倒了。

Trees______ ______ _______.

脊髓灰质炎密切接触者应严密观察()

A．7天

B．l0天

C．15天

D．20天

E．30天