如果不指明函数过程参数的类型，则该参数的数据类型为______。

一种电视机，现价每台2400元，比原价降低了600元，降低了百分之几？

Sagrada Familia ( 2,056,448 visits/year)

Opening hours: 09:00—18:00 (October—March); 09:00—20:00 (April—September)

Admission: $ 11, or $ 10 with the Barcelona Card.

Disabled Access: Yes.

The temple have been under construction since 1882 and they’ve still got another 30 to 80 years to go before it will be finished. The project’s vast scale and its special design have made it one of Barcelona’s top tourist attractions for many years.

La Pedrera (1,133,220 visits/year)

Opening hours: November—February: 09:00—18:30; March—October: 09:00—20:00

Admission: $ 9.50. Save 20% with the Barcelona Card.

Disabled Access: No.

This building used to be called Casa Mila but nowadays it’s more commonly known as La Pedrera. It is a unique modernist building in Barcelona and was made of bricks and had colorful tiles (瓦). It was built between 1906 and 1912 by famous Catalan architect Antoni Gaudi (1852—1926) and in 1984 it was declared a UNESCO World Heritage site with other Gaudi buildings in Barcelona. Visitors to La Pedrera can see the amazing 800 square meters attic with 270 brick arches that give you a feeling that you are walking inside the skeleton (骨架) of a whale. The roof is equally impressive and is preserved exactly the way that it was built in 1912 with six staircases and seven chimneys each made in a unique style.

Barcelona FC Museum (1,032,763 visits/year) 

Opening hours: 6^th April—4^th October: (Monday to Saturday) 10:00—20:00; the rest of the year: 10:00—18:30

Admission: $ 8.50 for entry to the museum and $ 17 for a guided tour.

Disabled Access: Yes.

When you buy your ticket you have two options. You can buy a ticket for the museum to see the football stadium or you can buy a dual (双的) ticket for $ 15 where you get to see the museum and the scenes at the club.

Miro Museum (518,869 visits/year)

Opening hours: Check the web site for details as they vary depending on the time of the year.

Admission: $ 8. Save 20% with the Barcelona Card.

Disabled Access: Yes.

This museum has a wide range of Miro’s work dating back as far as 1914. This artwork collection not only includes his paintings but also a good selection of sculptures (雕塑).

L’Aquarium de Barcelona (1,375,271 visits/year)

Opening hours: 09:00—19:00 (October—March); 09:00—20:00 (April—September)

Admission: $ 7. Save 10 % on the entrance fee to the aquarium with the Barcelona Card.

Barcelona Aquarium is a popular Barcelona attraction to take the kids and young ones. I have to admit I love the aquarium.

Picasso Museum (887,958 visits/year)

Opening hours: Check the website for details as they vary depending on the time of the year.

Admission: $ 9 for main exhibition—extra for special showings. Save 50% with the Barcelona Card.

Disabled Access: Yes. The museum has arranged Picasso’s paintings in chronological order from his early days to his final works. Arranging the paintings in this way gives you a fascinating insight into the development of Picasso thinking over time and shows how he developed the distinctive designs that he is famous for today. Very popular art gallery.

小题1:Which of the following attractions is the most popular with people?

A．Sagrada Familia

B．La Pedrera

C．Barcelona FC Museum

D．Picasso Museum小题2:What do we know about the tourist attractions mentioned in the above passage?

A．Sagrada Familia is the largest building in Barcelona.

B．La Pedrera is well-known for its colorful material.

C．Barcelona FC Museum may attract football fans.

D．Miro Museum was built in 1914.小题3:If you visit the stadium and the club with a tour guide in Barcelona FC Museum, you should pay ________.

A．$ 25.5

B．$ 32

C．$ 42.5

D．$ 34小题4:What do the attractions have in common?

A．They are all famous for their architectural style.

B．They are available for the disabled people.

C．Their opening hours are changeable in different seasons.

D．Tourists can have a discount of 20% with the Barcelona Card.

现有A、B、C、D、E五种物质，并存在如下转化关系，其中E为黑色粉末。

Ⅰ、利用下图所示的实验装置进行C与水的反应，回答下列有关问题

（1）将分液漏斗中的水滴入试管，然后：

①在导管口处进行适当操作，观察现象。

②观察烧杯中的现象为：__________________________。根据所观察现象可得到的两个结论是_______________________________。

③写出试管中反应的化学方程式____________________________。

（2）已知水与C反应生成D及另一种化合物F，在通常状况下，足量F的稀溶液与含溶质为1mol的稀盐酸完全反应时放出akJ的热量，请写出该反应的热化学方程式___________________________。

Ⅱ、在加热条件下，某无氧酸（含有A中的一种元素）的浓溶液与E反应，生成单质气体X。为检验X的性质，设计如下图所示实验装置

（3）请写出此实验中制备单质气体X的离子反应方程式_________________________。

（4）实验过程中，观察到装置Ⅲ中品红试纸的红色褪去，并未观察到“无明显变化”这一预期现象。为了达到这一预期现象，你认为应该如何改进？_____________________________________。

（5）实验结束后，装置Ⅳ中可观察到现象是____________________________，若滴加两滴胶头滴管中的试剂，观察到溶液呈红色，胶头滴管中的试剂为：_______________________________。

高校校讯通包月套餐资费为（）元/月。

A.2元

B.3元

C.4元

D.5元

在我国，（）不需要向中国人民银行交存存款准备金。

A.财务公司

B.信用合作社

C.金融租赁公司

D.证券公司