汽油的10%馏出温度高低将影响发动机的（）。A、转速 B、噪音 C、低温启动性 D、

根据拼音写出相应的词语。（4分）

（1）老斑羚凭着xián shú（     ）的跳跃技巧，在半大斑羚从最高点往下降落的瞬间，身体出现在半大斑羚的蹄下。

（2）他不想让diān pèi（     ）在外的同乡蒙受阴影。

（3）如果看一张地图，并假定把非洲和南美洲拼合在一起，你就会看到它们拼合得多么tiān yī wú fèng（        ）。

（4）做一个公民，我们要kè jìn  zhí shǒu（        ）。

叶的下列结构中，能进行光合作用的是（　　）

A．上下表皮细胞

B．保卫细胞

C．角质层细胞

D．筛管细胞

Scientists in Israel have discovered a new way to test for water pollution by “listening” to what the plants growing in water have to say.

By shining a laser beam (激光束) on the tiny pieces of algae floating in the water，the researchers said they hear sound waves that tell them the type and amount of contamination (致污物) in the water.

“It is a red light，telling us that something is beginning to go wrong with the quality of water，” said Zvy Dubinsky，an aquatic biologist at Israel’s Bar Ilan University.“Algae is the first thing to be affected by a change in water quality.”“The secret，” he said，“is to measure the rate of photosynthesis (光合作用) in the algae，meaning the plant’s ability to transform light into energy.” During photosynthesis，plants also release oxygen into the air.

Dubinsky’s technique is easy to perform because of the over­abundance of algae in the planet’s water.Most of the oxygen in the atmosphere comes from algae.A prototype tester that occupies about one square meter of a laboratory desktop，shoots a laser beam at water samples to stimulate photosynthesis in the algae.But not all of the laser’s heat is used.Depending on the condition of the algae and the rate of photosynthesis，some of the heat is shot back into the water，creating sound waves，Dubinsky said.With a special underwater microphone，researchers are able to analyze the strength of the sound waves and determine the health of the algae and the condition of the surrounding water.

“Algae suffering from lead poisoning，like waste discharged from battery and paint manufacturing plants，will produce a different sound than those suffering from lack of iron or exposure to other toxins，” said researcher Yulia Pinchasov.She said that testing algae photosynthesis can determine water quality more accurately and easily than labor­intensive methods now used like chemical and radioactive carbon testing.

小题1:The underlined word “algae” in Paragraph 2 probably refers to a kind of________.

A．instrument

B．plant

C．wood

D．pollutant小题2:Why is the algae tested?

A．Because it floats on the water.

B．Because it can have photosynthesis.

C．Because it is the first to be polluted.

D．Because it can produce different sounds.小题3:We can infer from the passage that________.

A．algae can produce a loud sound when polluted

B．algae can die easily from pollution

C．photosynthesis of the algae can only be caused by sunlight

D．photosynthesis of the algae is related to water quality小题4:What would be the best title for the passage?

A．Scientists Listen to Plants to Find Water Pollution

B．A Prototype Tester Is Used to Determine Water Pollution

C．The Importance of Photosynthesis of the Algae

D．The Problem of Chemical and Radioactive Carbon Testing

颈静脉怒张见于（）

A.肝硬化

B.右心衰竭

C.左心衰竭

D.肺结核

E.心律失常

当（）汗于1479年即位以后，蒙古社会逐渐由动荡不安转入黄金家族的稳定控制之下。