阅读短文，判断正(√)误(×)。

      My name is Jenny. I am a school girl. I am ten years old. I'm tall and thin. I have a beautiful bag. It is blue.

I like my bag. This is my English teacher. He is Mr. Brown. He has got a black bicycle. He goes to school by

bicycle. I have got a good friend in the school. He is Jack.

( ) 1. Jenny is a girl.

( ) 2. Jenny is not short.

( ) 3. Jenny has a blue bag.

( ) 4. Mr. Brown is Jenny's father.

( ) 5. Mr. Brown goes to school by bus.

( ) 6. Jenny's good friend is Jack.

某地一位司机在车祸中受重伤，被同行的人送到附近一家医院抢救。经查：伤员多发性骨折，多脏器破裂，如不及时手术，会有生命危险。但手术需要亲属签协议书。可伤员的同行者谁也不敢代签。这时，主刀医师的上级医生签了协议书，表示承担责任。经过医务人员的全力抢救，伤员脱险。

对该上级医生的做法的正确伦理评价应该是（）

A.正确，医生在医患关系中居主导地位，最有权力决策

B.正确，权威医生在任何时候都可以代替患者做主

C.正确，医生既已受到患者信托，必要时必须承担责任

D.错误，未经家属委托

E.错误，医生本人和医院承担的风险太大