患者李某，66岁，因老年慢性支气管炎，痰液黏稠不易咳出，为帮助祛痰，给予氧气雾化吸入

按要求句型转换

1. The Forbidden City lies in the center of Beijing.(对画线部分提问)

     _______ _______ the Forbidden City_______ ?

2. People visited the West Lake. They were impressed by the beautiful scenery. (连成一句 )  

    People_______ _______the West Lake_______ _______  by the beautiful scenery.

3. My brother will go to the party on time. My brother is ill. (用 unless连接句子)

    My brother_______ _______to the party on time_______  _______is ill.

4. My mother divided the cake into four parts. (改为同义句)  

    The cake_______ _______into four parts_______ my mother.

5. People said the writer was famous at his time. (改为同义句)

     _______ _______ _______the writer was famous at histime.

（1）观察如下反应,总结规律,然后完成下列问题:

①Al(OH)₃+H₂OAl(OH)₄^－ +H⁺     ②NH₃+H₂ONH₄⁺+OH^-

（A）已知B(OH)₃是一元弱酸，试写出其电离方程式                              

（B）已知N₂H₄是二元弱碱，试写出其二步电离方程式                              

                                                               。

（2）将a mol Cl₂通入含 b mol FeBr₂的溶液中，若0<a/b≤1/2时，反应的离子方程式为2Fe²⁺ +Cl₂ = 2Fe³⁺ +2 Cl^－，写出另2个可能发生的离子方程式。

①当1/2< a/b<3/2时                                                。

②当a/b≥3/2时                                                    。

突触传递的特征有（）

A.单向传导

B.总和

C.相对不易疲劳

D.中枢延搁

E.对内环境变化敏感

一朵苹果树的花，哪一部分被害虫吃掉后将不能结出果实？（　　）

A．花瓣

B．雄蕊

C．雌蕊

D．萼片

某学生试用八会穴治疗疾病。

该生治疗心血管疾病，应选：（）。

A.章门

B.膻中

C.阳陵泉

D.中脘

E.太渊