按照以概率理论为基础的极限状态设计方法，建筑结构工程必须满足的要求是（）。 A.安全
题型：单项选择题
问题：
按照以概率理论为基础的极限状态设计方法，建筑结构工程必须满足的要求是（）。
A.安全性、适用性、可靠度
B.安全性、可靠性、耐久性
C.安全性、适用性、耐久性
D.适用性、耐久性、可靠度
题型：单项选择题
| 完形填空。 | |||
 A peacock and a nightingale It was a fine day. A peacock was dancing happily in the forest. He began to __1__ suddenly because he saw a nightingale __2__ in a tree. He said to the nightingale sadly, "You have a sweet __3__ , but I don't have." Just then the king of birds came. He asked, "Peacock, why are you so __4__ ? " the peacock said to __5__ , "I have such a beautiful body, but my voice is so bad that everyone will __6__ me." The king of birds said, "You don't __7__ to be sad. All things have their own strong points (优点) and weaknesses. For example, you have a beautiful body but don't have a sweet voice. A nightingale has a sweet voice, but he doesn't __8__ as beautiful as you. __9__ you should learn to live __10__ your weakness. Do you think it's right? | |||
| ( ) 1. A. laugh ( ) 2. A. sitting ( ) 3. A. voice ( ) 4. A. active ( ) 5. A. her ( ) 6. A. laugh at ( ) 7. A. want ( ) 8. A. watch ( ) 9. A. So ( ) 10. A. on | B. cry B. working B. noise B. sad B. me B. agree with B. need B. see B. And B. with | C. sing C. singing C. sound C. calm C. him C. wait for C. think C. look C. But C. in | |