传染病报告需要订正报告时，诊断日期不需要订正的是（） A.同一病种由临床诊断订正为实

如图所示，边长为L的正方形导线框底边水平，且平行于正下方的磁场边界，正下方的匀强磁场宽度均为L，磁感强度等值反向，两磁场区域紧邻．当线框底边进入磁场I区域时，导线框恰好做匀速运动，这时导线框的电功率为P．则当导线框底边刚进入磁场II区域时，下列结论正确的是（　　）

A．导线框作加速运动，其加速度为g/2

B．导线框作减速运动，其加速度大小为3g

C．导线框作减速运动，其瞬时电功率为2P

D．导线框作减速运动，其瞬时电功率为4P

阅读理解。

     That cold January night, I was growing sick of my life in San Francisco. There I was walking home at

one in the morning after a tiring practice at the theater. With opening night only a week away, I was still

learning my lines. I was having trouble dealing with my part-time job at the bank and my acting at night at

the same time.

     As I walked, I thought seriously about giving up both acting and San Francisco. City life had become too

much for me. As I walked down empty streets under tall buildings, I felt very small and cold. I began running,

both to keep warm and to keep away from any possible robbers. Very few people were still out except a few

sad-looking homeless people under blankets.

     About a block from my apartment, I heard a sound behind me. I turned quickly, half expecting to see

someone with a knife or a gun. The street was empty. All I saw was a shining streetlight. Still, the noise had

made me nervous, so I started to run faster. Not until I reached my apartment building and unlocked the door

did I realize what the noise had been. It had been my wallet falling to the sidewalk.

     Suddenly I wasn't cold or tired any more. I ran out of the door and back to where I'd heard the noise.

Although I searched the sidewalk anxiously for fifteen minutes, my wallet was nowhere to be found.

     Just as I was about to give up the search, I heard the garbage truck pull up to the sidewalk next to me.

When a voice called from the inside, "Alisa Camacho?" I thought I was dreaming. How could this man know

my name? The door opened, and out jumped a small red-haired man with an amused look in his eyes. "Is this

what you're looking for?" he asked, holding up a small square shape.

    It was nearly 3 a.m. by the time I got into bed. I wouldn't get much sleep that night, but I had got my

wallet back. I also had got back some enjoyment of city life. I realized that the city couldn't be a bad place as

long as people were willing to help each other.

1. How did the writer feel when she was walking home after work? [ ]

A. Cold and sick

B. Lucky and hopeful

C. Satisfied and cheerful

D. Disappointed and helpless

2. From the first paragraph, we learn that the writer was busy _____. [ ]

A. solving her problem at the bank

B. taking part in various city activities

C. learning acting in an evening school

D. preparing for the first night show

3.On her way home the writer _____. [ ]

A. lost her wallet unknowingly

B. was stopped by a garbage truck driver

C. was robbed of her wallet by a man with a knife

D. found some homeless people following her

4. In the fifth paragraph, why did the writer say she was dreaming? [ ]

A. Someone offered to take her back home

B. A red-haired man came to see her.

C. She heard someone call her name

D. Her wallet was found in a garbage truck

5. From the text, we can infer that the writer _____.[ ]

A. would stop working at night

B. would stay on in San Francisco

C. would make friends with cleaners

D. would give up her job at the bank

动风先兆见

A．白睛发红
B．两眦赤痛
C．睑缘赤烂
D．全目赤肿
E．两眦红润

根据三个时间估计法，假设某项目的乐观时间为6天，悲观时间为16天，正常时间为8天，则该项目的期望时间为 (49) 天。

A．9

B．8

C．10

D．11

水泵接合器的数量，应按室内消防用水量计算确定，每个接合器的流量按______L/s计算。

A．5～10
B．5～15
C．10～15
D．10～20