小丽同学自己用漆包线在铁钉上绕成匝数足够多的电磁铁,来探究电磁铁磁性强弱与电流大

题型:探究题

问题:

小丽同学自己用漆包线在铁钉上绕成匝数足够多的电磁铁,来探究电磁铁磁性强弱与电流大小的关系,如图所示:

 

(1)利用如图所示装置小丽无法探究电磁铁磁性强弱与电流大小的关系,原因是                 ,在电源电压不变的情况下,她还应选择一个                        

(2)为了比较电磁铁磁性强弱的变化,她还应选取适量的        

A. 小铁钉        

B. 铝钉          

C. 细铜屑

考点:影响电磁铁磁性的因素
题型:探究题

阅读理解。

    Shanghai, a beautiful city during the day, becomes even more wonderful at night. At the end of the day,

both the older part of the city around the Bund and the more modern buildings in Pudong are full of colourful

bright lights. The buildings, both new and old, look completely different and very exciting.

    If you look across the Huangpu River, you can see the brilliant Oriental Pearl TV Tower and the Jinmao

Tower. Take a boat along the river and you can see the amazing night life on the Bund. There are more than

30 tour boats, including ancient dragon boats in the Ming and Qing styles and boats made in the Shikumen

style. You will never forget this unusual sightseeing experience.

    If you prefer walking in the streets, try the famous Nanjing Road Pedestrian Street. There are busy shops

and cafes and you will see thousands of local people enjoying themselves. Most of the shops close at 10 pm.

but at that time, tea houses are still open. In fact, some of them are open 24 hours a day. Karaoke bars and

coffee houses are also popular nightlife places where you can meet friends and make new ones.

    If you are in Shanghai for the first time, make sure you also visit Xintiandi, a very popular area where you

can see buildings in Western and Chinese style side by side. Most of the buildings are modern inside and

contain galleries, fashion shops, restaurants and coffee houses. Open air bars are also popular here.

    Xintiandi is a great place for young people, but it may be a little noisy for older visitors! A quieter place to

visit is Park 97, near the west gate of Fuxing Park in Luwan District. Park 97 opened in 1997 and you can

find clubs and international restaurants like Baci where you can get Italian food and Tokyo Joe's a Japanese

restaurant.

1. Shanghai looks great during the day and             at night. [ ]

A. not as nice

B. the same

C. even better

D. larger

2. Sightseeing             is a wonderful way to see the city. [ ]

A. by boat

B. in the cafes

C. by taxi

D. in the planes

3. The Nanjing Road is a pedestrian street, which means a street            . [ ]

A. for people and bicycles

B. for people but no cars

C. a famous street

D. for rich people

4. There are             in Fuxing Park. [ ]

A. clubs and open air bars

B. discos and sightseeing boats

C. big bookshops

D. foreign restaurants

题型:探究题

内部评估人员所在部门负责人审核评估报告后认为需要调整评估价值且幅度超过()%(不含)的,须更换内部评估人员重新进行评估,并按要求履行相应程序。

A.5

B.10

C.15

D.30

题型:探究题

对于体积大于1.5m3的调压柜(落地式)应有爆炸泄压口,爆炸泄压口不应小于上盖或最大柜壁面积的( )。

A.50%
B.40%。
C.30%
D.20%

题型:探究题

执行机构包括哪三大类()

A.电动执行机构

B.气动执行机构

C.液动执行机构

D.风动执行器

题型:探究题

请用不超过150字的篇幅,概括出给定资料所反映的主要问题。

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