今有氧的同位素16O、17O、18O，氢的同位素H、D，从水分子的原子组成来看，

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      When we talk about stars, especially women stars, it seems that they are always young, pretty and own attractive body shapes. But recently a Britain’s Got Talent（英国达人）star Susan Boyle has changed our views completely.

      Simon Cowell, one of the organizers of the talent show spoke of his surprise over Ms Boyle’s voice. “This lady came up, and I’m thinking, ‘This will take five seconds and I can go to have a cup of tea.’ That changed when she began to sing I Dreamed a Dream from Les Miserables. She knew we were going to have that reaction（反应）and just to see that look of satisfaction on her face midway through - it was one of my favorite moments,” Cowell said.

      The performance was posted online and before long, the 47-year-old Scottish woman has been famous all over the world.

      Speaking from her home in Scotland, Ms Boyle said that she hadn’t thought of changing her appearance. She said that her friend helped her with make-up. “I mean, it’s meaningless.” She added.

      Ms. Boyle also spoke of the reason she first began to explore her musical talents. “ I was kind of slow at school, so getting something like singing was a good way of hiding behind that and therefore it built my confidence.’’

1. Susan Boyle had a look of satisfaction on her face when she was singing because ________.          

A. she was confident of her singing

B. she was satisfied with the organizers

C. she was pretty and in good shape

D. she sang the song I Dreamed a Dream from Lea Miserables  

2. According to the passage, which is NOT true?

A. It was the musical talents that built Susan's confidence.

B. Susan Boyle was not good at her lessons when at school.

C. Susan Boyle became famous because of her appearance.

D. Simon Cowell didn't think Susan Boyle a good singer at the time sight.

3. What can we learn from Susan Boyle’s success?

A. It’s never too old to learn.  

B. It’s easier to succeed at the age of 47.

C. If you have a dream, keep trying to make it come true!  

D. If you are not able to study well, to be a singer instead.

已知函数f（x）=x³﹣3ax﹣1，a≠0

（1）求f（x）的单调区间；

（2）若f（x）在x=﹣1处取得极值，直线y=m与y=f（x）的图象有三个不同的交点，求m的取值范围．

男，62岁，身高1．70m，体重60kg，糖尿病史10年，一直服D860治疗，近来发现ALT增高，A／G倒置，尿糖（+++），蛋白（++），血糖15mmol／L（270mg／dl），BUNlommol／L（28mg／dl）。下述治疗哪种选择最有利（）。

A.苯乙双胍（降糖灵）+格列喹酮（糖适平）

B.格列本脲（优降糖）+胰岛素

C.糖适平+降糖平

D.胰岛素+降糖平

E.胰岛素+二甲双胍

国内生产总值用( )表示。

A．DGP
B．PGD
C．GPD
D．GDP

2015年天津男职工产假怎么规定？具有有几天？