鼠疫首选药物是（） A.庆大霉素 B.林可霉素 C.链霉素 D.红霉素 E.卡那霉素

患者平素多忧思抑郁，每遇情志刺激而诱发，发时突然呼吸短促，息粗气憋，胸闷胸痛，咽中如窒，喉中无痰声。舌质淡红苔薄白，脉弦。

治疗应首选（）

A.苏子降气汤

B.桑白皮汤

C.五磨饮子

D.真武汤

E.平喘固本汤

巴西通用的语言是[ ]

A．英语

B．西班牙语

C．葡萄牙语

D．俄语

患者主诉右上第一磨牙阵发性自发性疼痛，医生检查作温度测验时应如何进行（）。

A.先测患病的右上第一磨牙

B.先测正常的右上前磨牙

C.先测正常的左上第一磨牙

D.先测正常的右下第二磨牙

E.先测正常的右下第一磨牙

A． A、B、C、D、E、F为原子序数依次增大的短周期主族元素。 A、F原子的最外层电子数均等于其周期序数，F原子的电子层数是A的3倍；B原子核外电子分处3个不同能级，且每个能级上排布的电子数相同；A与C形成的最简单分子为三角锥形；D原子p轨道上成对电子数等于未成对电子数；E原子核外每个原子轨道上的电子都已成对，E电负性小于F。

⑴写出B的基态原子的核外电子排布式     。

⑵A、C形成的最简单分子极易溶于水，其主要原因是     ；与该最简单分子互为等电子体的阳离子为     。

⑶比较E、F的第一电离能：E   F（选填“＞”或“＜”）。

⑷BD₂在高温高压下所形成的晶胞如右图所示。该晶体的类型属于    （选填“分子”、“原子”、“离子”或“金属”）晶体，该晶体中B原子的杂化形式为    。

⑸光谱证实单质F与强碱性溶液反应有[F(OH)₄]^—生成，则[F(OH)₄]^—中存在   。

a．共价键     b．非极性键     c．配位键     d．σ键     e．π键

B．某研究性学习小组对过量炭粉与氧化铁反应的气体产物成分进行研究。

⑴提出假设 ①该反应的气体产物是CO₂。

②该反应的气体产物是CO。

③该反应的气体产物是      。

⑵设计方案 如图所示，将一定量的氧化铁在隔绝空气的条件下与过量炭粉完全反应，测定参加反应的碳元素与氧元素的质量比。

⑶查阅资料

氮气不与碳、氧化铁发生反应。实验室可以用氯化铵饱和溶液和亚硝酸钠（NaNO₂）饱和溶液混合加热反应制得氮气。

请写出该反应的离子方程式：      。

⑷实验步骤

①按上图连接装置，并检查装置的气密性，称取3.20g氧化铁、2.00g碳粉混合均匀，放入48.48g的硬质玻璃管中；

②加热前，先通一段时间纯净干燥的氮气；

③停止通入N₂后，夹紧弹簧夹，加热一段时间，澄清石灰水（足量）变浑浊；

④待反应结束，再缓缓通入一段时间的氮气。冷却至室温，称得硬质玻璃管和固体总质量为52.24g；

⑤过滤出石灰水中的沉淀，洗涤、烘干后称得质量为2.00g。

步骤②、④中都分别通入N₂，其作用分别为       。

⑸数据处理

试根据实验数据分析，写出该实验中氧化铁与碳发生反应的化学方程式：

        。

⑹实验优化 学习小组有同学认为应对实验装置进一步完善。

①甲同学认为：应将澄清石灰水换成Ba(OH)₂溶液，其理由是    。

②从环境保护的角度，请你再提出一个优化方案：        。

阅读理解。

     Situated in the South West of England, between Exeter and Plymouth, Torquay is one of the most popular

holiday resorts in Britain. It provides sophisticated (精致) entertainment, sports of every kind and cultural

facilities, all set in a position of outstanding natural beauty. Visitors can choose between luxury hotels by the

sea, with private suites (套房), swimming pools, and comfortable but less expensive guest houses. There are

camping sites, too, and hundreds of houses displaying "B & B" signs.

     As well as a number of small quiet bays, which are ideal for beach barbecues (野餐) away from the crowds,

Torquay has large sandy beaches where you can buy refreshments (饮料) and hire deck chairs, boats and even

beach houses. There are large areas of grassland overlooking the sea, and miles of winding cliff paths for

walkers who just want to enjoy the scenery and what is often said to be the healthiest air in the country. For the

sportsmen and women there are opportunities not only for golf, tennis, but also for water-skiing, hang-gliding

(悬挂式滑翔机) and deep-sea fishing.

     After a day in the open air, there's lots to do in the evenings, too. There are plenty of discos, the occasional

opera or ballet, and summer variety shows in the seafront theatres. For the children, there is a beautiful model

village with a complicated railway layout which is remarkably realistic-especially when the lights are all on at

night.

     Of course, there's no need to spend your whole holidays in Torquay. Only a short drive away is Dartmoor

National Park, where you can walk for miles through dramatic (戏剧性的), unspoiled (未损坏的) countryside,

or picnic by beautiful rivers and streams. Or, nearer to home, you can sail across Tor Bay to the lovely old

fishing village of Brixham.

     Torquay seems to have something for everyone. But don't take my word for it-come and see for yourself.

1. Which of the following best explains what "B & B" means on the signs? [ ]

A. Bed and breakfast.

B. Breakfast and bathroom.

C. Bathroom and barbecue .

D. Beautiful and British.

2. According to the first two paragraphs, Torquay might be described as _____. [ ]

A. comfortable and expensive

B. crowded and lively

C. dramatic and beautiful

D. natural and healthy

3. What is special about the model village? [ ]

A. It opens at night.

B. It has some toys for the children.

C. It's in the open air.

D. It has a nearly real railway system.

4. What is the purpose of writing this passage? [ ]

A. To introduce the geography of Torquay to students.

B. To make some places known to visitors.

C. To show the beauty of resorts.

D. To attract more tourists.