读图回答，下列问题 小题1:20世纪60-90年代初，最有可能从日本迁移到珠江

男性，15岁，因右侧腰部酸胀，劳累后加重就诊，无发热和肾绞痛史。B超右肾中度积水。尿常规正常。

进一步应先做（）。

A.IVU

B.KUB

C.CT

D.逆行性输尿管造影

E.放射性核素扫描

某化学活动兴趣小组的同学进行木炭还原氧化铜的探究实验，生成物是红色固体和无色气体．他们通过查阅资料后，得知氧化亚铜（Cu₂O）为红色固体，因此，猜测生成物里有CO和Cu，还可能有CO和Cu₂O．又知Cu₂O能和常见的酸（HNO₃除外）反应生成Cu²⁺和Cu．为此，请你和他们一起进行如下探究．

（1）探究气体中是否有CO气体：甲同学设计的方案是：将气体干燥后，再通过灼热的氧化铜，未反应完的气体直接排放到空气中．乙同学设计的方案是：将气体通过足量的氢氧化钠溶液后，干燥，再点燃．

①甲同学实验后如果有______色固体生成，说明一定含有CO气体；

②上述两种方案中可选用的一种气体干燥剂是______；

③从空气污染的角度考虑，你认为上述两种方案中______同学的方案更好，你的理由是______．

（2）探究红色固体中是否有Cu₂O：

①在如下方法中：a．上网查询  b．实验   c．请教老师

猜想你认为最能解决实际问题的方法是______（填字母序号）．

②请你设计一个简便的实验方案，检验红色固体中是否有Cu₂O．

     Exploit your parking space

     An unused parking space or garage can make money. If you live near a city center or an airport, you

could make anything up to￡200 or￡300 a week. Put an advertisement (广告) for free on Letpark or

Atmyhousepark.

     Rent (出租)a room

     Spare room? Not only will a lodger (房客)earn you an income, but also, thanks to the

governmentbacked "rent a room" program, you won't have to pay any tax on the first ￡4,500 you make

per year. Try advertising your room on Roomspare or Roommateeasy.

     Make money during special events

     Don't want a fulltime lodger? Then rent on a shortterm basis. If you live in the capital, renting a room

out during the Olympics or other big events could bring in money. Grashpadder can advertise your space.

     Live on set

     Renting your home out as a "film set" could earn you hundreds of pounds a day, depending on the film

production company and how long your home is needed. A quick search on the Internet will bring up

dozens of online companies that allow you to register your home for free-but you will be charged if your

home gets picked.

     Use your roof

     You need the right kind of roof, but some energy companies pay the cost of fixing solar equipment

(around ￡14,000)and let you use the energy produced for nothing. In return, they get paid for unused

energy fed back into the National Grid. However, you have to sign a 25year agreement with the supplier, which could prevent you from changing the roof.

1. If you earn ￡5,000 from renting a room in one year, the tax you need to pay will be based on

________.

A. ￡300  

B. ￡500

C. ￡4,500  

D. ￡5,000

2. Where can you put an advertisement to rent out a room during a big event?

A. On Letpark.  

B. On Roomspare.

C. On Grashpadder.  

D. On Roommateeasy.

3. If you want to use energy free, you have to ________.

A. sign an agreement with the government

B. pay around ￡14,000 for the equipment

C. sell the roof to some energy companies

D. keep the roof unchanged within 25 years

4. For whom is the text most probably written?

A. Lodgers.  

B. Advertisers.

C. House owners.  

D. Online companies.

Java语言中的浮点数默认类型是______。

疏、排水的支管与主管连接时，宜按介质流向稍有倾斜，（）不应接入同一主管。

A.不同介质、压力的疏水支管

B.不同介质、压力的排水支管

C.不同介质的疏、排水支管

D.不同压力的疏、排水支管