There is no excuse for not doing your assignments（作业）. If you can’t come to school, you should call your teacher or your classmate and ask about homework. It is your responsibility（责任）to find out what homework you have missed. It is not the teacher’s job to remind you of the missed assignments.

You must not be absent on a test day. If you are seriously ill, call and let the teacher know you will not be there for the test. If your teacher allows a make-up test（补考），you should take the test within one or two days after you return to class. Serious illness is the only reason for missing a test.

Be on time! It is impolite to be late. Also, it bothers other students. If you must come in late, be sure to do it quietly. Have your books and papers out of your bag before you come into the room. Then go to your seat and sit down quietly. In the USA, it is not necessary to knock before you enter the classroom. Most teachers will give you a low grade if you are often late.

In America, you should call your teacher by his or her last name instead of “ teacher”. Also you should use Mr, Miss, Ms or Mrs before the last name ( such as Mrs Smith or Mr Jones). This is polite. The teacher will tell you the title that he or she likes. It is impolite in the USA to eat, drink or chew gum during class. Don’t do these until the break. Also, removing your shoes in the classroom is not polite.

小题1:What should you do if you miss a class?

A．Give an excuse for missing the assignments.

B．Tell the teacher you can’t come to school or do the assignments.

C．Ask your teacher to remind you of the missed assignments.

D．Call your teacher or your classmate to find out what assignments were given.小题2: When can a student miss a test according to the passage?

A．When he / she is late for the test.

B．When he/ she is really sick.

C．When he / she failed another test.

D．When he / she doesn’t want to have the test.小题3: In America, if your teacher’s name is Susan Black, what should you call her politely?

A．Ms Black

B．Ms Susan

C．Susan Black

D．Teacher Black小题4:Which of the following is NOT true according to the passage?

A．A student is thought to be impolite when he / she takes off his / her shoes in

the classroom.

B．A student is thought to be impolite when he / she eats and drinks in class.

C．When a student is late for class, he / she must knock before he / she enters the

classroom.

D．A student is thought to be impolite when he/she doesn’t come for class on time.

本题包括A、B两小题，分别对应于“物质结构与性质”和“实验化学”两个选修模块的内容。请选定其中一题，并在相应的答题区域内作答。若两题都做，则按A题评分。

A．砷（As）在地壳中含量不大，但砷的化合物却是丰富多彩。

（1）基态砷原子的电子排布式为    ▲   ；砷与溴的第一电离能较大的是    ▲   。

（2）AsH₃是无色稍有大蒜味气体。AsH₃的沸点高于PH₃，其主要原因是    ▲   。

（3）Na₃AsO₄可作杀虫剂。AsO₄^3-的空间构型为    ▲   ，与其互为等电子体的一种分子为    ▲   。

（4）某砷的氧化物俗称“砒霜”，其分子结构如右图所示。该化合物的分子式为    ▲   ，As原子采取    ▲   杂化。

（5）GaAs等是人工合成的新型半导体材料，其晶体结构与金刚石相似。GaAs晶体中，每个As与    ▲   个Ga相连，As与Ga之间存在的化学键有    ▲   （填字母）。

A．离子键  B．σ键  C．π键  D．氢键  E．配位键  F．金属键  G．极性键

B．某研究小组以苯甲醛为原料，制备苯甲酸和苯甲醇。反应原理如下：

有关物质的部分物理性质如下：

（1）在250 mL锥形瓶中，放入9 g KOH和9 mL水，配成溶液，冷却至室温。加入10.5 g新蒸馏的苯甲醛，塞紧瓶塞，用力振荡，使之变成糊状物，放置24 h。

①苯甲醛要求新蒸馏的，否则会使   ▲  （填物质名称）的产量相对减少。

②用力振荡的目的是   ▲  。

（2）分离苯甲醇

①向锥形瓶中加入30 mL水，搅拌，使之完全溶解。冷却后倒入分液漏斗中，用30 mL乙醚萃取苯甲醇（注意留好水层）。30 mL 乙醚分三次萃取的效果比一次萃取的效果   ▲  （填“好”或“差”）。

②将醚层依次用饱和亚硫酸氢钠溶液、饱和碳酸钠溶液和水各5 mL洗涤，再用无水硫酸镁干燥。将干燥后的乙醚溶液转移到100 mL蒸馏烧瓶中，投入沸石，连接好普通蒸馏装置，加热蒸馏并回收乙醚，应选择的加热方法是   ▲  （填字母代号）。

A．水浴加热      B．油浴加热      C．沙浴加热     D．用酒精灯直接加热

③改用空气冷凝管蒸馏，收集   ▲  ℃的馏分。

（3）制备苯甲酸

在乙醚萃取过的水溶液中，边搅拌边加入浓盐酸酸化至pH＝3.5左右。冷却使结晶完全，抽滤，洗涤、干燥。抽滤完毕或中途停止抽滤时，应先   ▲  。