乙型脑炎的潜伏期一般为（）A、10d～14d B、7ｄ～10d C、10ｄ～21d D、1
题型：单项选择题
问题：
乙型脑炎的潜伏期一般为（）
A、10d～14d
B、7ｄ～10d
C、10ｄ～21d
D、14ｄ～21d
题型：单项选择题
The English are often considered as unfriendly people who don't talk to strangers, but not London taxi drivers. I once asked a cabbie to describe his life to me and he didn't stop talking until I arrived home half an hour later. He told me many interesting stories and this is one of them: “Some very strange things happen late at night. The other day I was taking a woman home from a party. She had a little dog with her. When we got to her house she foun
d that she'd lost her key. So, I waited in the cab with the dog while she climbed up the window.”“ I waited … and waited … After half an hour of ringing the bell I decided to find out what was going on. I tied the dog to a tree and started to climb up the window. The next thing I knew was that the police came. They thought that I was trying to rob the house! Luckily, the woman came downstairs, she'd gone to sleep and forgotten about me and the dog. I was in such a hurry to get away that I forgot to ask her for the fare (车费).”
小题1:In the writer’s opinion, London taxi drivers are _____________.
A．unfriendly
B．talkative
C．helpful
D．strange enough小题2: From the passage we guess that the writer ______.
A．is the driver of the taxi
B．often travels by taxi
C．is a foreigner visiting London
D．lives in London小题3:What does the underlined word “cabbie” mean in this passage?
A．Conductor
B．Stranger
C．Taxi driver
D．author小题4:The man was waiting outside the woman's house because ______.
A．he began to like the woman and her dog at the first sight
B．the woman had not paid him
C．he wanted to know what would happen when the police came
D．he was trying to go on talking with her
，B为三阶非零矩阵，且AB=O，则t=______．