化学兴趣小组为验证铁、铜、锌三种金属的活动性顺序，设计了四种实验方案，每种方案所

MG患者中，胸腺几乎都有异常，10％～15％MG患者合并_______瘤。

腹泻脱水患儿补液后排尿，此时输液瓶中尚有不含钾液体300ml，此液体中最多可加入10%氯化钾（）

A.6ml

B.9ml

C.10ml

D.12ml

E.16ml

科西嘉岛上的野生摩弗伦绵羊是8 000年前该岛逃过家庭驯养的绵羊的直接后代。因此他们为考古学家们提供了在刻意选种产生现代绵羊开始之前早期驯养的绵羊的模样。 以上的论证得到了下面哪个假设

A．8 000年前的驯养绵羊与现在的野生绵羊非常的不同。

B．同时逃过家庭驯养的绵羊品种中，不存在其他作为摩弗伦绵羊的祖先。

C．现代的驯养绵羊是8 000年前野生绵羊的直接后代。

D．摩弗伦绵羊与它们8 000年前的祖先之间的相似之处比它们与现代驯养绵羊之间的相似之处多。

E．在过去8 000年中，科西嘉岛的气候一点也没有变化。

阅读理解。

     New technology that can " see" through clothing and detect what 's underneath can now be used to scan

crowds, making it a potentially effective tool to prevent terrorist attacks in public places.

     The Thru Vision T5000 camera picks up Terahertz rays,or T-rays, which are naturally sent out by all

objects and can pass through clothes or even walls. The camera can then detect metallic and nonmetallic

objects hidden under clothing on still or moving subjects without showing any body detail.

     While similar technology is seen at airports around the world, the T5000 is designed to be used in large,

open areas. With a range of 25 meters, the T5000 can screen people in public places, thus avoiding

bottle-necks at border crossing or security checkpoints. It also means people can be screened without

knowing it.

     The technology develops from British astronomers ' work in studying dying stars. Astronomers use T-ray

cameras to see through dust and clouds in space. The company sees uses for its camera at other sites where

political or business activities take place.

     For privacy concerns,Thru Vision Chief Executive Clive Beattie said the image produced by the camera

did not show detailed parts of the body." It's almost a shining light bulb (灯泡)." Beattie said. "You don' t see

the detail that people might be concerned about." In London' s busy Piccadilly Circus-which is already filled

with closed-circuit surveillance (监视) cameras- reaction to the new technology was mixed. Some said the

camera was going too far and violating privacy,but others said they are willing to put safety before privacy

concerns." There ' s surveillance everywhere anyway," said one commuter. "I don' t think it' s much of a

difference. I don' t care that they can see through me because they can see me anyway."

     Some experts said the privacy violation of the camera was not worth the benefit. " What we should

consider is how much we want to lose our privacy in order to obtain a sort of national security," said David

Murakami Wood, director of the Surveillance Studies network,which deals with surveillance and privacy

problems." In most cases this isn' t real security-it 's a sense of safety that has very little real effect."

1. What can we learn about T5000?

A. It can detect metallic and nonmetallic objects underneath.

B. It can see through clothing or walls by sending out T-rays.

C. It was first used to observe stars by astronomers.

D. It is widely used at airports around the world.

2. What is the most probable purpose of the new invention?

A. To improve people ' s life standard.

B. For scientific research.

C. For commercial benefits.

D. For safety reasons.

3. Which is most probably the opinion of people on using the new camera?

A. Some agree to its use as it is new technology to protect privacy.

B. Some agree to its use because safety is the most important.

C. Some don' t agree to its use because it makes no difference.

D.Some people don' t care because they know little about it.

4. What' s the main idea of the last paragraph?

A. Safety is more important than privacy.

B. T5000 is more beneficial than harmful.

C. T5000 does not really provide security.

D. It's not worth giving up privacy for safety.

假设，甲乙订立合同的时候，乙公司利用甲公司对市场行情的无知，捏造市场行情，将洗衣机以高价卖与甲公司。后市场行情发生变更，该品牌洗衣机价格急速上升，乙公司想撤销该合同，将洗衣机以更高的价格卖于丙公司。遂乙公司以自己欺诈为由向法院起诉。下列说法正确的是：( )。

A．甲乙双方均可以行使撤销权

B．履行合同对乙不利，乙公司可以行使撤销权

C．履行合同对甲有利，甲公司不可以行使撤销权

D．甲公司可以行使撤销权