（）使给入炉堂的煤粒处于悬浮和沸腾状态。

铊盐与氰化钾被列为A级危险品，铊（Tl）与铝同主族，Tl³⁺与Ag在酸性介质中发生反应：Tl³⁺ +2Ag===Tl⁺ +2Ag⁺且已知Ag⁺ +Fe²⁺===Ag+Fe³⁺，则下列推断正确的是（    ）

A．Tl⁺最外层有3个电子

B．氧化性：Tl³⁺＞Ag⁺＞Fe³⁺

C．Tl(OH)₃与Al(OH)₃相似，也是两性氢氧化物

D．铊位于第五周期ⅢA族

希尔排序法属于______ 类型的排序法。

A．交换类排序法

B．插入类排序法

C．选择类排序法

D．建堆排序法

生物降解塑料能在微生物的作用下降解成二氧化碳和水，从而消除废弃塑料对环境的污染，PHB就属于这种塑料，其结构简式为下面有关PHB的说法不正确的是 [ ]

A．PHB是高分子化合物

B．CH₃CH₂CH(OH)COOH在一定条件下可以制得PHB

C．通过加聚反应可以制得PHB

D．在PHB的降解过程中有氧气参加

阅读理解。

     BUY A COMPUTER && LEARN HOW TO SURF THE INTERNET!

     Surfers' Paradise, the largest computer chain in Singapore, is offering a special package (软件包) for

school students for the month of June only!

     Enjoy:

     Free Internet connection package;

     Free basic Internet training from our computer school;

     Free computer peripherals (外围设备) worth $300.  

     Simply purchase a computer from any of our stores and you'll get the free gifts listed above. Show us

your Transitlink concession pass (so we know you are a school student) and get an added 30% discount

off (折扣)any computer model!

     Call on us at:

     Main Office

     Blk 152 International Industrial Complex

      Singapore 531122

     Opening Hours: 10 am to 10 pm, 7 days a week

     City Branch

     123 Computer City

      Singapore 991199

     Opening Hours: 10 am to 6 pm, closed Sundays and public holidays

     East Coast Branch

     22-24 Pinetree Avenue

     Singapore 551155

     Opening Hours: 10 am to 6 pm, closed Sundays and public holidays

1. If one buys a computer from Surfers' Paradise, he can enjoy ______.

A. free computer games                

B. free Internet facilities(设备)

C. free home servicing for two years      

D. huge discounts

2. According to the ad, a buyer must pay for ______.

A. the computer                      

B. the Internet connection

C. the computer peripherals            

D. the computer lesson on the Internet

3. The Transitlink concession pass is necessary so that a student can ______.

A. receive free gifts                  

B. get a free lesson

C. pay less for a computer              

D. buy computer peripherals at a discount

4. Mr. Samy is interested in buying a computer for his son but he can only make it on Sundays.

    They should go to ______.

A. the Main Office

B. the City Branch

C. the East Coast Branch

D. any of the branches listed

甲省的单某到乙省出差，因违反乙省的地方性法规规定，被执法机关处罚，单某辩称，我是甲省人，我这样做在甲省是允许的。执法人员解释说，你现在在乙省，根据乙省的地方性法规，你这样做不允许。对于双方争议的法律法规适用问题，下列说法正确的是______。

A．应适用乙省的地方性法规

B．应适用甲省的地方性法规

C．如何适用，应报请全国人大常委会裁决

D．应参照甲、乙两省的地方性法规