阅读短文,回答问题. 激光 你一定见过绚丽多彩的激光吧,激光是1960年才被发现

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阅读短文,回答问题.

激  光

你一定见过绚丽多彩的激光吧,激光是1960年才被发现的,其特点是波长单一,高度集中,不四处扩散.1963年,有科学家用激光做了个实验:用一束激光瞄准一个红色的大气球,大气球里还有一个蓝色的小气球.激光居然穿过大气球,刺破了小气球,而大气球安然无恙.参观者弗洛克医生由此想到:能否用激光穿过角膜去封住视网膜上破裂的血管,“点焊”视网膜呢?他大胆地进行了实验,手术只用几分钟,取得了圆满成功.原来,用50W激光器照射机体,在焦点上会形成1000~1500℃的高温,焦斑周围会产生极薄的热凝固层,“焊”住了血管,阻止了毛细血管流血.这样,激光手术刀便成了医生的有力武器.

(1)文中科学家采用的激光是______.

A.红颜色           B.黄颜色        C.蓝颜色        D.绿颜色

(2)激光______(可能/不可能)是白色光.

(3)弗洛克医生在给病人修复视网膜时,是把激光的能量转化成______能.

(4)你能说出激光还有哪些应用吗?(至少举两例)

考点:机械能转化与守恒
题型:问答题

《UCP600》规定,除商业发票外,其他单据中对货物的描述均可使用统称。( )

题型:问答题

When I was younger it seemed that the super hero was Batman or Spiderman. As I grew up, I looked to real people with some of these qualities to be my super hero including being strong, honest, friendly, brave, skilled, hardworking, and reliable. The person I think of when I hear these words is my dad.

My dad is one of the toughest people I have ever met. He has been through it all. When I was five, 60 percent of his body was burned. In 1999 he fell from a tree, breaking his arm and shattering his ankle. In 2004, he had a liver transplant (移植) after being on the list for six years after a bad blood transfusion that gave him Hepatitis C. Now, my dad is 45 years old and feels better than he has in 15 years.

My dad is one of the most reliable people I know. Anything I ask of him, he does. Whenever he tells me he is going to do something, it is always done before I get home from work. Whenever I need my dad, he is there. When I was ten and he told me my grandmother was going to die, I felt really down. He was the one there trying to cheer me up.

My dad has worked hard for everything he has. At home, he is always busy doing projects and has painted every room in our house. After our shop was built, he constructed an office you would think a professional built. When I do something stupid, he helps me fix it. Of course, he does his complaining, but I know he likes fixing things just as much as I like tearing them up.

My dad has been one of the greatest parts of my life. I have learned a lot from watching him and I don’t believe I will ever meet anyone like him. I hope when I grow up, I can possess the same qualities as my dad, and have someone look up to me as a good role model. This is why my dad is my hero. 

小题1:The author describes his father as reliable mainly _________.

A.by appearance

B.by example

C.by comparison

D.by behavior小题2:What does the underlined word “shattering” mean in Paragraph 2?

A.breaking

B.transplanting

C.burning

D.destroying小题3:The second paragraph is mainly about ___________?

A.the reasons why 60% of Father’s body was burned.

B.the successful skin transplant in 2010.

C.the sufferings Father has gone through in the last 15years.

D.the operations that Father had through his 45 years of struggle小题4:Which of the following can best describe the father?

A.busy, tough and reliable

B.strong, skilled and optimistic

C.tough, reliable and hardworking

D.rough, reliable and friendly小题5:Which of the following can best serve as the title of this passage?

A.My Father—My Hero

B.My Father and I

C.A Man Who Survived

D.A Good Model to Respect

题型:问答题

下列受体和阻断剂的搭配正确的是()

A.异丙肾上腺素--普萘洛尔

B.肾上腺素--哌唑嗪

C.去甲肾上腺素--普萘洛尔

D.间羟胺--育亨宾

E.多巴酚丁胺--美托洛尔

题型:问答题

表面活性剂的分子特点是具有()结构,分别称为()基和疏水基。

题型:问答题

命令按钮Command1的Caption属性为“退出(x)”,要将命令按钮的快捷键设为“Alt+ X”,应修改Caption属性为 ______。

A.在x前插入“&”

B.在x后插入“&”

C.在x前插入“#”

D.在x后插入“#”

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