列出21首下乳方的医著是()A．《通乳十二法》 B．《诸病源候论》 C．《备急千金要

阅读陶渊明的《归园田居》（其一），回答下面的问题。（4分）

少无适俗韵，性本爱丘山。

误落尘网中，—去三十年。

羁鸟恋旧林，池鱼思故渊。

开荒南野际，守拙归园田。

方宅十余亩，草屋八九间。

榆柳荫后檐，桃李罗堂前。

暧暧远人村，依依墟里烟。

狗吠深巷中，鸡鸣桑树巅。

户庭无尘杂，虚室有余闲。

久在樊笼里，复得返自然。

小题1:这首诗抒发了作者怎样的情感？（2分）

小题2:品味“户庭无尘杂，虚室有余闲。”这句诗的韵味。(2分)

阅读理解。

     The term "multitasking" originally referred to a computer's ability to carry out several tasks at one time.

For many people, multitasking has become a way of life and even a key to success. In fact, some excellent

mental aerobic exercises (大脑训练) involve engaging the brain in two or more challenging activities at a

time. Although checking e-mail while talking on a phone and reading the newspaper may be second nature

for some people, many times multitasking can make us less productive, rather than more. And studies show

that too much multitasking can lead to increased stress, anxiety and memory loss.

     In order to multitask, the brain uses an area known as the prefrontal cortex (前额叶脑皮层). Brian scans

of volunteers performing multiple tasks together show that as they shift from task to task, this front part of

the brain actually takes a moment of rest between tasks. You may have experienced a prefrontal cortex

"moment of rest" yourself if you've ever dialed (拨电话) a phone number and suddenly forgotten who you

dialed when the line is answered. What probably occurred is that between the dialing and the answering,

your mind shifted to anther thought or task, and then took that "moment" to come back. Research has also

shown that for many volunteers, job efficiency (效率) declines while multitasking, as compared to when

they perform only one task at a time.

     Multitasking is easiest when at least one of the tasks is habitual, or requires little thought. Most people

don't find it difficult to eat and read the newspaper at the same time. However, when two or more attention-

requiring tasks are attempted at one time, people sometimes make mistakes.

     We often don't remember things as well when we're trying to manage several details at the same time.

Without mental focus, we may not pay enough attention to new information coming in, so it never makes

it into our memory stores. That is one of the main reasons we forget people's names-even sometimes right

after they have introduced themselves. Multitasking can also affect our relationships. If someone checks

their e-mail while on the phone with a friend, they may come off as absent-minded or disinterested. It can

also cause that person to miss or overlook key information being passed on to them.

1. Why are some mental aerobic exercises designed to engage people in multitasking?

A. To make them more productive.

B. To reduce their stress and anxiety.

C. To develop their communication skills.

D. To help them perform daily tasks more easily.

2. According to Paragraph 2, why may a person suddenly forget who has called?

A. He may leave his prefrontal cortex temporarily damaged.

B. He is probably interrupted by another task.

C. He is probably not very familiar with the person he has called.

D. He may need a rest between dialing and speaking.

3. People tend to make mistake when _____.

A. they perform several challenging tasks at a time

B. new messages are processed one after another

C. their relationships with others are affected

D. the tasks require little thought

4. What is the main idea of the passage?

A. Multitasking has become a way of life.

B. Multitasking often leads to efficiency decline.

C. Multitasking exercises need to be improved.

D. Multitasking enables people to remember things better.

票汇方式用于预付款的出口交易，出口人收到国外银行汇票或银行本票时，即可发运货物。

一般不认为（）是细胞分化中基因表达调控的一个普遍机制

A、DNA重排

B、DNA甲基化

C、组织特异基因的表达

D、一些非特异基因表达被抑制

复元活血汤中大黄的炮制要求是（）

A.先煎

B.后入

C.炒炭

D.酒浸

E.生用