交流发电机的定子或转子线圈断路、短路，会导致发电机（）。 A.充电电流过大 B.充电

阅读理解。

     Lucy lives in England. She knows something about China on television.

But she wants to know more. So she is looking forward to visiting China.

She will have a holiday next week. She is going to visit Beijing because she

likes Chinese culture. She is going there by plane and then stay in a hotel. In Beijing she is going to do some sightseeing, and visit the Forbidden City, the Summer Palace and walk up the Great Wall.

     Lucy also likes Chinese animals. She likes Chinese pandas very much. So

she is going to visit the Beijing Zoo to see pandas there and take some photos of them. On the last day in Beijing she is going to go shopping. She wants to buy her sister a present. Her sister likes Chinese silk  and Chinese  painting.

1.Lucy is looking forward to visiting China because      .

A. she is going to know something more about China

B. she lives in America

C. she can know China on television

D. she is not Chinese

2. Lucy is going to       to China.

A. take a bus

B. take a ship

C. take the plane

D. take a car

3. Where is she going to visit in Beijing?

A. The Forbidden City, the Summer Palace, the Great Wall and a hotel.

B. The Forbidden City , the Summer Palace , and a hotel.

C. The Forbidden City, the Summer Palace, the Great Wall and the Beijing

Zoo.

D. The Forbidden City, the Summer Palace , the Beijing Zoo and a hotel.

4. Lucy wants to take some photos of the pandas because      .

A. she likes taking pictures

B. she takes the pictures to study pandas

C. Beijing has a big zoo

D. she likes pandas

5. Lucy is going to buy her sister some        .

A. photos of pandas

B. Chinese silk and Chinese paintings

C. Chinese silk

D. Chinese paintings

在测量“金属丝的电阻率”的实验中：

（1）用螺旋测微器测量金属丝的直径如图所示，则该金属丝的直径为___________mm；

（2）若某次实验测出金属丝两端的电压为U，通过的电流为I，接入电路的长度为L，金属丝的直径为d，则该金属的电阻率ρ=___________。

印花的人纤长丝缎纹或斜纹布

关于SLE的叙述正确的有()。

A．SLE是累及全身多个系统的自身免疫性疾病

B．育龄妇女高发

C．典型皮损为面部蝶形红斑

D．其筛查试验为血清抗核抗体检查

E．多数可自愈

调查表的填写可以用红墨水。