在牺牲阳极保护中,保护电流的大小主要取决于两极金属之间的电位差。

题型:判断题

问题:

在牺牲阳极保护中,保护电流的大小主要取决于两极金属之间的电位差。

考点:油气田水处理工考试中级油气田水处理工考试中级油气田水处理工考试题库
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无牙颌患者,全口义齿戴用1周。主诉黏膜压痛且位置不确定,咀嚼时义齿易脱位。检查:面部形态自然,义齿固位良好,基托边缘伸展适度,但咬合时义齿轻度扭转。其原因是()

A.初戴不适应

B.基托变形

C.基托翘动

D.咬合干扰

E.垂直距离过高

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一艘轮船的排水量10000吨,在河水中排开水的体积是        3,受到的浮力是    N,轮船的总质量是       ,如果它从长江驶入大海,排开水的体积将      ,受到的浮力将      (填“变大”“变小”“不变”)船身将           (填“上浮一些”或“下沉一些”)

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阅读理解

     People around the world watched Britain's Prince William and Kate Middleton get married.

     The royal wedding broke records for live streaming on the Internet. It also produced more than

two million tweets on Twitter.

     The ceremony took place on Friday at Westminster Abbey in London.

     Kate wore a flowing white gown designed by Sarah Burton, the creative director of Alexander

McQueen. William wore a red army uniform.

     It was Britain's biggest wedding since William and Harry's parents, Prince Charles and Princess

Diana, were married in nineteen eightyone.

    Nearly two thousand guests filled the church on Friday. Hundreds of thousands of people went

to the streets and parks of London to watch the wedding on video screens.

    Among the wedding guests were English football star David Beckham and his wife Victoria,

British Prime Minister David Cameron, the king of Norway and singer Elton John.

    Bahrain's crown prince(皇储)was invited but decided not to attend because of unrest in his country.

Britain took back an invitation to the ambassador from Syria over violence against protesters there.

    After the ceremony, the royal couple traveled to Buckingham Palace. Crowds cheered when the

newlyweds appeared on a balcony, greeting to them.

    Later, William drove his wife out of Buckingham Palace in an opentop Aston Martin car. William

and the newest member of the royal family will now be known as the Duke and Duchess of Cambridge.

     Kate is twentynine years old. William will be twentynine in June. His grandmother is Queen

Elizabeth. His father, Prince Charles, is first in line to become king. William, as the older son, is second

in line. Kate would not become queen, however, since she is not in the royal blood line. There was a

big celebration at the  University of St. Andrews in Scotland. That was where William and Kate first

met as art history students in two thousand one.

1. Which of the following is NOT true about Prince William?

A. He has been in love with Kate for over ten years.

B. He wore a red army uniform in the ceremony.

C. As a prince, he is first in line to become king.

D. He once majored in art history.

2. Which of the following was absent from the wedding?

A. The Beckhams.

B. Elton John.

C. The king of Norway.

D. The crown prince of Bahrain.

3. What can be the best title of the passage?

A. The Britain's biggest wedding takes place.

B. The most luxurious wedding in the world.

C. David Beckham attends the wedding.

D. Royal wedding draws a worldwide crowd.

题型:判断题

DNA合成和蛋白质合成有哪些相似处,试列举四点。

题型:判断题

顾客并不像通常所描述的那么容易被操纵。他们知道自己需要什么。他们需要的东西,和别人认为他们需要的东西,可能有很大的差别。据此可知( )。

A.广告投资与商品销售不成正比

B.大多数人购物认准一种品牌多年不变

C.在进入商店前顾客大都知道要买哪种牌子的商品

D.顾客在商店购物时一般不喜欢他人的介绍或建议

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