某地（地区人口稳定）对伤寒、副伤寒甲、乙三联菌苗的效果进行评价，观察资料统计如下：其

2012年1月，广西河池宜州市境内龙江河发生了镉浓度超标事件。根据该事件某化学活动小组开展了一次关于金属镉与铜、银活动性顺序的探究及镉污染事故处理方法的研讨活动。查阅资料：①镉（Cd）是一种银白色金属，在化合物中通常表现为+2价   ②水体中镉元素通常以氯化镉的形式存在       ③氯化镉能溶于水，氢氧化镉难溶于水

（一）（1）金属镉与铜、银活动性顺序的探究

实验结论：活动性顺序：镉＞铜＞银

（二）（2）对镉污染事故处理方法的讨论小聪认为可用向受污染河段抛撒过量烧碱固体的方法除去氯化镉，反应原理用化学方程式表示为                                   。小敏认为该方案虽然有效，但有缺陷，原因是                                 。受小聪与小敏启发，你认为可以用          （写俗称）代替烧碱。

Planning a visit to the UK? Here we help with ways to cut your costs.

AVOID BIG EVENTS  Big sporting events, concerts and exhibitions can increase the cost of accommodation and make it harder to find a room. A standard double room at the Thistle Brighton on the final Friday of the Brighton Comedy Festival (19 Oct.) cost £169.15 at Booking.com. A week later, the same room cost £118.15.

If you can be flexible and want to know dates to avoid—or you’re looking for a big event to pass your time—check out sites such as Whatsonwhen.com, which allow you to search for events in the UK by city, date and category.

STAYAWAY FROM THE STATION If traveling to your destination by train, you may want to find a good base close to the station, but you could end up paying more for the sake of convenience at the start of your holiday.

Don’t be too choosy about the part of town you stay in. Booking two months in advance, the cheapest room at Travelodge’s Central Euston hotel in London for Saturday 22 September was £95.95. A room just a tube journey away at its Covent Garden hotel was £75.75. And at Farringdon, a double room cost just £62.95.

LOOK AFTER YOURSELF Really central hotels in cities such as London, Edinburgh and Cardiff can cost a fortune, especially at weekends and during big events. As an alternative consider checking into a self-catering flat with its own kitchen. Often these flats are hidden away on the top floors of city centre buildings. A great example is the historic O’Neill Flat on Edinburgh’s Royal Mile, available for £420 for five days in late September, with room for four adults.

GET ON A BIKE London’s ‘Boris bikes’ have attracted the most attention, but other cities also have similar programmes that let you rent a bicycle and explore at your own pace, saving you on public transport or car parking costs.

Among the smaller cities with their own programmes are Newcastle (casual members pay around £1.50 for two hours) and Cardiff (free for up to 30 minutes, or £5 per day). (358 words)

小题1:The Brighton Comedy Festival is mentioned mainly to show big events may __________.

A．help travelers pass time

B．attract lots of travelers to the UK

C．allow travelers to make flexible plans

D．cause travelers to pay more for accommodation小题2:“Farringdon” in Paragraph 5 is most probably __________.

A．a hotel away from the train station

B．the tube line to Covent Garden

C．an ideal holiday destination

D．the name of a travel agency小题3:The passage shows that the O’Neill Flat __________.

A．lies on the ground floor

B．is located in central London

C．provides cooking facilities for tourists

D．costs over £100 on average per day in late September小题4:Cardiff’s program allows a free bike for a maximum period of __________.

A．half an hour

B．one hour

C．one hour and a half

D．two hours小题5:The main purpose of the passage is __________.

A．to tell visitors how to book in advance

B．to supply visitors with hotel information

C．to show visitors the importance of self-help

D．to offer visitors some money-saving tips

       1972年，周恩来会见某国领导人时说：“你的手伸过世界上最辽阔的海洋来和我握手——25年没有交往了啊！”引文中的“你”是： [ ]

A、美国总统

B、英国女王

C、日本首相

D、法国 * *

据植物学家估计，现在地球上生长着可供人类食用的植物约有75000种，但目前只有约3000种被人们尝试过。人工栽培利用的只有（）左右。

A.100种

B.200种

C.300种

D.400种

（）是梁丘穴的正确定位。

A、髂前上棘与髌骨外缘连线上，髌骨外上缘上2寸的凹陷处

B、髂前上棘与髌骨外缘连线上，髌骨外上缘上6寸的凹陷处

C、脐上4寸，旁开2寸

D、脐下4寸，旁开2寸