成型机中冷却水起什么作用（）A．冷却高速电机 B．冷却润滑油 C．冷却大盘电机 D．

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     In the year 480 BC the Greek allies (联军) faced invasion by the King of Persia,Xerxes,who

commanded a huge army of about half a million men.When the Persian army marched into northern

Greece,the Greek states,led by Athens and Sparta,were ill equipped to deal with the threat.The Persians

were well supplied with food and weapons.Their army included infantry,cavalry,and a large navy.It seemed that they would easily defeat the Greeks.

     The Greek allies decided to send 10,000 men northwards to slow down the Persians,while the rest

prepared to defend their homelands.A group of 300 best Spartan soldiers were chosen to lead the force

going north,with Leonidas in command.Leonidas realised that the only hope of slowing the Persians would be to block the narrow passage of land at Thermopylae.The Pass of Thermopylae was the route between

the mountains and the sea,and was so narrow that only a few men could get through at a time.

     When the Persian army arrived at Thermopylae,they found Leonidas' tiny army opposing them.The

Persians attacked,but could not get through.They attacked again and again,but each time they were driven back by the Greeks,led by the fearless Spartans.Leonidas'plan worked well until a Greek traitor called

Ephialtes went to Xerxes.He told the Persian king about a goat's path in the mountains that would take the Persian army past Thermopylae.When Leonidas saw the enemy crossing the mountains,he realised that he could no longer hold Thermopylae.He sent all the Greek soldiers except the 300 Spartans back to their

homelands.

     The Spartans waited for the 500,000 Persians at the goat's path.Although hopelessly outnumbered,the Spartans fought bravely.They all died,but the other Greeks were able to get home to strengthen the

defences.

1. Compared with the Persian army,the Greek allies were very______.

A. powerful  

B. wise  

C. weak    

D. foolish

2. The Pass of Thermopylae was very important for the Greeks because________.

A. it was easy to hold but hard to attack

B. only very small boats could get through it

C. it was a secret pass unknown to the Persians

D. a huge number of soldiers could be stationed there

3. Why did Leonidas send most of his soldiers back to their homelands?

A. Because their homelands were under attack.

B. Because he found they were not brave enough.

C. Because the Persians gave up attacking Thermopylae.

D. Because he found it impossible to hold Thermopylae.

4. Which of the following is NOT true according to the passage?

A. Leonidas was a great commander.

B. The Persians failed to pass Thermopylae.

C. Ephialtes betrayed his own country.

D. The 300 Spartans would be regarded as heroes by the Greeks.

5. Which of the following would be the best title for the passage?

A. The Greek Allies  

B. The Goat's Path

C. The King of Persia  

D. Xerxes and Ephialtes

将考生文件夹下SUICE文件夹中的文件夹YELLOW的隐藏属性撤销。

离心式压缩机在运行中由于吸入流量不足造成喘振的原因是（）。

A.进气阀开度不够或进气通道阻塞

B.压缩机减速或停机时气体未放空或未回流

C.出口逆止阀失灵或关不严

D.防喘振装置未投自动

对消防头盔进行质检时的披肩缝制的针距密度检验时明线每3cm不应小于（）针。

A.9.0

B.10.0

C.11.0

D.12.0

曾几何时，手机还是时尚的一种象征。今天，它已经成为甚至中小学生都拥有的普通的通讯工具。截至2013年2月，中国手机用户突破10亿户。面对这一巨大市场，投资商、制造商、销售商蜂拥而上，我国出现了巨大的手机供应市场；另外一方面，随着科学技术的发展，生产手机的社会劳动生产率不断提高，使得手机售价大幅下滑，我们熟悉的同种品牌的手机从几千元的价格降到了几百元。

结合材料，分析手机价格下降的原因。