选择100例肺癌患者和200例对照进行吸烟与肺癌关系的病例对照研究，调查发现100例

有机物A是常用的食用油抗氧化剂，分子为C₁₀H₁₂O₅，可发生如下变化：

已知B的相对分子质量为60，分子中只含一个甲基．C的结构可表示为：

（其中—x、一y均为官能团）。请回答下列问题：

（1）根据系统命名法，B的名称为        ；官能团一x的名称为        ；高聚物E的链节为         ；A的结构简式为           。

（2）反应⑤的化学方程式为                                                        

（3）C有多种同分异构体，写出其中2种符合下列要求的同分异构体的结构简式          、          。

①含有苯环 ②能发生银镜反应 ③含有酚羟基

（4）从分子结构上看，A具有抗氧化作用的主要原因是           （填序号）。

A．含有苯环    B．含有羰基    C．含有酚羟基

高血脂症是现代人的健康杀手之一，科学家最新研制的一种可用于治疗高血脂的新药H可按如下路线合成。

合成中可能用到的信息

信息1：

信息2：两个羟基同时连在同一个碳原子上的结构是不稳定的，会发生脱水反应： 根据以上图示和信息，回答下列问题：

（1）反应①-⑤中属于取代反应有_______________（填写反应的编号），B中官能团的名称为______________。

（2）完全燃烧时，1mol D与1mol下列的耗氧量相同_______（填写字母的代号）。

a. C₆H₆ b. C₇H₈O₃ c. C₆H₁₀O₂ d. C₇H₈O

（3）G的分子式为C₁₀H₂₂O₃，写出E、F结构简式：E____________，F___________。

（4）写出与I互为同分异构体，且既含有苯环又能发生银镜反应的物质的结构简式_________、_________、_________、_________。

（5）写出F与新制氢氧化铜悬浊液反应的化学方程式：__________________________________。

（6）写出H与NaOH溶液共热的化学方程式_________________________________________。

基准代号圆圈内的字母可采用任意拉丁字母。( )

I was a single parent of four small children, working at a low paid job. Money was always tight, but we had a (1) over our heads, food on the table, clothes on our backs, and if not a lot, always (2) . Not knowing we were poor, my kids just thought I was (3) . I’ve always been glad about that.

It was Christmas time, and although there wasn’t (4) for a lot of gifts, we planned to celebrate with a family party. But the big (5) for the kids was the fun of Christmas (6) .

They planned weeks ahead of time, asking (7) what they wanted for Christmas. Fortunately, I had saved MYM120 for (8) to share by all five of us.

The big (9) arrived. I gave each kid a twenty-dollar bill and (10) them to look for gifts of about four dollars each. Then everyone scattered. We had two hours to shop; then we would (11) back at the "Santa’s Workshop"

Driving home, everyone was in high Christmas spirits, (12) my younger daughter, Ginger, who was unusually (13) She had only one small, flat bag with a few candies—fiftycent candies I was so angry, but I didn’t say anything (14) we got home. I called her into my bedroom and closed the door, (15) to be angry again. This is what she told me.

"I was looking (16) thinking of what to buy, and I (17) to read the little cards on the ’Giving Trees’. One was for a little girl, four years old, and all she (18) for Christmas was a doll. So I took the card off the tree and (19) the doll for her. We have so much and she doesn’t have anything. "

I never felt so (20) as I did that day.

6（）。

A.little 

B.less 

C.enough 

D.more

铁路交通事故极易造成人员群死群伤，特别是（），人员的伤亡率更高。

A.列车脱轨事故

B.列车之间相撞事故

C.列车颠覆事故

D.列车与人相撞事故