已知函数$f\left(x\right)=\left\{\begin{array}{c}{3}^x,x\le 1\\ {\log }_{\frac{1}{3}}x,x>1\end{array}\right.$，则函数y=f（1﹣x）的大致图象（　　）

根据短文理解完成下列各题。

    Mrs. Green had a young dog which was very clever. It often helped her buy a newspaper. One winter evening, the dog went out to play. It was snowing heavily. Soon the ground(地面) became white.

     “The dog never loses his way. Where is he now?” Mrs. Green thought. She shouted(喊) his name.

    But still the dog didn't come back. So she telephoned the police and told them a lot about her dog.

    “My dog is very clever. He always goes out and comes back soon. Sometimes he plays with his friend, Mickey. He can buy a newspaper. He almost talks.”

    The policeman was tired and said, “I think you'd better put your telephone down. Maybe he is trying to telephone you now.”

A: Hello, Lisa. Nice to meet you.

B: Hi, Leila. Nice to meet you, too.

A: ____.

B: I'm thirteen. What about you?

A: Fourteen, ____

B: It's March 5^th. And you?

A: ____

B: Oh, it's coming soon. ____

A: Yes, I do. Can you come to my party?

B: ____. Thanks

A. How much is it?

B. How old are you?

C. Happy birthday!

D. When is your birthday?

E. My birthday is January 10^th.

F. Yes, I'd love to.

G. Do you want to have a birthday party?

实验表明，BR基因的表达与转录因子BZR1是否能作用于启动子有关．当BR浓度低时，BIN2会处于活性状态使BZR1降解失活．当BR浓度高时，会诱导BRI1被激活，从而抑制BIN2的活性．