用眼底镜检查眼底，能看到哪些结构？

在保证合成反应温度的情况下，合成塔入口温度应尽量控制（）

A、高些

B、低些

C、尽量提高

D、以上都可以

和病人非正式交谈的主要特点是

A．谈话环境安静
B．谈话主题明确
C．交谈气氛轻松、自然
D．语句表达随意、开放
E．交流信息可靠、随机

质量m=6×10³kg的汽车，以v₀=10m/s的速度在平直的公路上匀速行驶，刹车后做匀减速直线运动，经t=2s速度变为v=6m/s，试求：汽车刹车后2秒内克服阻力做功的平均功率．

A 34-year-old mother has spoken of how she woke up thinking she was 15 years old and living in 1992.

Naomi Jacobs, from Manchester, was convinced she was still a teenager. In her mind, John Major was Prime Minister and George Bush Sr. was running the White House. She also showed how she screamed when a boy appeared and called her “Mum”. Mobile phones and e-mails were puzzling and Google, Facebook and YouTube sounded like made-up words, she said.

Ms. Jacobs, who had no memory of the years, was told by doctors that she had Transient Global Amnesia (TGA). She has now written a book about the experience which happened in 2008.

“I fell asleep in 1992 as a brave, very confident know-it-all-15-year-old, and woke up as a 32-year-old single mum living in a rented house,” Ms. Jacobs said. “The last thing I remember was falling asleep in my bed, dreaming about a boy in my class. When I woke up, I looked in the mirror and had the fright of my life when I saw an old woman with wrinkles staring back at me. Then a little boy appeared and started calling me Mum. That’s when I started to scream. I didn’t know who he was. I didn’t think he was much younger than I was, and I certainly didn’t remember giving birth to him. I began sobbing uncontrollably. I just wanted my mum. I couldn’t get my head around going to bed one night and waking up in a different century.”

TGA is a rare type of amnesia which can occur suddenly, affecting around three people per 100,000 each year. Fortunately, permanent memory loss is rare. Ms. Jacobs’ memory started to return after eight weeks.

Some people who often suffer from migraines (偏头痛) also appear to be more likely to have TGA. The cause of TGA is unknown. Some think that it may be caused by a temporary cut of blood flow to parts of the brain involved in memory.

小题1:When a little boy came to call her “Mum”, Naomi Jacobs was _____.

A．excited

B．frightened

C．worried

D．embarrassed小题2:What was the last thing Naomi Jacobs could remember?

A．She was a brave and confident girl.

B．She met an old woman with wrinkles.

C．George Bush Sr. was elected President.

D．She fell asleep dreaming of a boy in her class.小题3:According to the text, TGA _____.

A．is quite common

B．is caused by brain injuries

C．results in permanent memory loss

D．causes people to lose part of their memory小题4:What’s the main idea of the text?

A. Naomi Jacobs has a poor memory.

B. Naomi Jacobs gets an amazing career after TGA.

C. Naomi Jacobs wakes up with the memory of her youth.

D. Naomi Jacobs succeeds in overcoming the disease.

小题5:According to the passage, we know _______.

A．Ms. Jacobs’ memory returned to normal now

B．Ms. Jacobs often doesn’t remember things

C．Ms. Jacobs has not got married yet

D．Ms. Jacobs is very young now in deed

抽余液塔顶空冷器后温度一般控制在105～108℃，可以确保回流罐内大部分烃类不汽化，而水蒸汽保持汽态，经过塔顶（）冷却后实现水与烃类的分离。

A.水冷器

B.空冷器

C.回流罐水包

D.汽相管线