下列文字表述与反应方程式对应且正确的是（）。 A．溴乙烷中滴入AgNO3溶液检验其中

一般认为我国以家庭或个人致富为基本目标的古代私人理财思想萌芽于战国时期。 ( )

根据短文内容，用适当的单词完成下面句子。

Dear Mike,

     We got your letter yesterday. Yes, we can visit you at Christmas. We thought to spend Christmas at

home, but now we are going to be with you. Jack will not be in school then. The weather in Chicago is

cold, but it doesn't matter. Sometimes we like the snow. We got our plane tickets. We will get to your city

on the 18th. We will stay with you for two weeks. Is that all right with you? We'll take our favourite

recipes (食谱), so we can have a nice Christmas dinner.

      See you soon . 

                                                                                                                                    Love

                                                                                                                                    Mom and Dad

1. This letter is from Mike's _________.

2. In Chicago, it is _________ now.

3. Mike has a brother called __________. He is in school now.

4. Mike's parents will go to his city by _________.

5. His parents will come back on _________ 31^st .

关于休克肺，下列哪些不正确（）

A.休克肺又称急性呼吸窘迫综合征（ARDS）

B.因肺内动-静脉短路大量开放（解剖性分流）而缺氧

C.因肺水肿、肺不张及肺泡内透明膜形成影响气体交换（功能性分流）

D.晚期有严重呼吸性碱中毒

E.吸氧，氧流量需达6～8L/min才能缓解呼吸困难

2-丁烯是石油裂解的产物之一，回答下列问题：

（1）在催化剂作用下，2-丁烯与氢气反应的化学方程式为             ，反应类型为      。

（2）烯烃A是2-丁烯的一种同分异构体，它在催化剂作用下与氢气反应的产物不是正丁烷，则A的结构简式为          ；A分子中能够共平面的碳原子个数为      ，A与溴的四氯化碳溶液反应的化学方程式为             。

我国新石器时代几种具有代表性的文化表性的文化包括（）.

A．仰韶文化

B.马家窑文化

C.大汶口文化

D.龙山文化