流化

下列不属于犬的过敏性休克时的表现是（）

A、衰弱

B、虚脱

C、昏睡

D、脉搏慢而细弱

实验研究发现，硝酸发生氧化还原反应时，硝酸的浓度越稀，对应还原产物中氮元素的化合价越低。某同学取一定量铁、铝的合金与一定量很稀的硝酸充分反应，反应过程中无气体放出。在反应结束后的溶液中，逐滴加入2 mol/L的氢氧化钠溶液，所加氢氧化钠溶液的体积(mL)与产生的沉淀的物质的量(mol)的关系如图所示。试回答下列问题：

(1)图中OC段没有沉淀生成，此阶段发生反应的离子方程式为______________________________________________。

(2)在DE段，沉淀的物质的量没有变化，则此阶段发生反应的离子方程式为___________________________________。

(3)在EF段，沉淀的物质的量减少，写出此阶段发生反应的化学方程式： ___________________________________________。

(4)B与A的差值为________mol。

(5)B点对应沉淀的物质的量为________mol，C点对应的氢氧化钠溶液的体积为________mL。

. --- How about the food I ordered? I __________ for 20 minutes.

--- Sorry, sir. I will be back with your order in a minute.

A．have waited

B．have been waiting

C．will have waited

D．was waiting

口腔护理时用于治疗铜绿假单胞菌感染的常用漱口溶液是（）

A.1%过氧化氢溶液

B.2%硼酸溶液

C.4%碳酸氢钠溶液

D.0.2%呋喃西林溶液

E.0.1%醋酸溶液

请根据上下文内容，将文中划线部分译成汉语或英语。

Three mountains, Meili, Baimang and Haba, which 1. 被雪覆盖着, tower over the land. Their snowy mountaintops form a beautiful picture 2. that leave you at a loss for words.

Below the mountains, the sunshine reflects on the many lakes, making them shine like diamonds against the rich countryside. 3. Sheep, cattle and horses wander on the green grass, and the surrounding forests are home to many birds and animals. In this peaceful land, 4. 人们与自然完美和谐地共处, far away from the noise and worry of the outside world.

Nature has provided Shangri-la with endless natural treasures, 5. making the land a happy home for the local people.