3.碳化钛(TiC)、碳化硼(B4C3)、氮化硅(Si3N4)等非氧化物陶瓷是新型无机非金属材料,合成这些物质需在高温条件下进行,在合成它们的过程中必须注意 ( )
A.通入足量氧气 B.避免与氧气接触
C.通入少量氯气 D.通入少量氧气
2.耐火材料是一类熔点很高且经济的物质。下列各组物质均可用于做耐火材料的是( )
A.二氧化硅和金刚石 B.石墨和氯化镁
C.氧化镁和氧化铝 D.碳酸钙和氧化铝陶瓷
1.在下列反应里,氧化剂和还原剂的物质的量之比与质量之比不一致的是 ( )
A.Cl2 + H2O = HClO + HCl B.3NO2 + H2O = 2HNO3 + NO
C.SiO2 +3C SiC + 2CO↑ D.Si + O2 SiO2
第三节 书面表达(满分30分)
假使你叫李华,是高一学生,你所在学校和美国California州一所中学实施互派“exchange students”的友好合作项目,你家被定为“host family”,一个名叫John Stephenson的将在你家住三年。现在,请根据下面的提示,以李华的名义给John Stephenson发一封e-mail,告诉他有关情况。
提示:1.得知他的到来全家人非常高兴。父母已为他准备好了一个房间,既可作卧室也可作书房。
2.你们可以一起上学、锻炼身体、上网、参观访问,还可以互相学彼此的语言等。
3.相信你们将对彼此的国家和人民有更多的了解,会一起度过一段美好的时光。
第二节 短文改错(共10小题;每小题1分,满分15分)
此题要求改正所给短文中的错误。对标有题号的每一行作㈩判断:如无错误,在该行右边横线上画一个勾(/);如有错误(每行只有一个错误),则按下列情况改正:
此行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写㈩该词,并也用斜线划掉。
此行缺一个词:在缺词处加一个漏字符号(八),在该行右边横线上写㈩该加的词。
此行错一个词:在错的词下划一横线,在该行右边横线上写㈩改正后的词。
注意:原行没有错的不要改。
Dear Editor,
My name is Li Hua. Recently I find more and more difficult to 76.
communicate with our parents on some questions. For example, 77.
I do want to have a relaxing summer vacation, and they want to 78.
send me to some training class. I want to find a part-time job, 79.
but they say I was too young. What's more, they think I can't do 80.
the hard work. I want to do a social survey, but they say that it 81.
is actually waste of time. I am feeling helpless. Would you like 82.
to give me some advice on what is to do with this? I would appreciate 83.
it that I could get your help. I'm sure, with your help, I call solve 84.
these problems easily. I'm looking forward to hear from you soon. 85.
Yours, Li Hua
第一节 单词拼写(共10题;每小题1分,满分10分)
根据下列句子及所给汉语注释,写出空缺处各单词的正确形式。(每空只写一词)
66. Though you’re (熟悉) with the poem, you’ll try to learn it by heart.
67. People in Australia enjoy staying (户外).
68. His visit became less (频繁的) as time passed.
69. The doctor (表扬) our daughter for her courage this morning.
70. This football game was (播出)live on TV across Europe.
71. This company is one of the Post Office’s biggest (顾客).
72. They lived in London until quite (最近).
73. Could you (递送) this letter to the accounts department?
74. Who is to (负责) for the failure?
75.You may read after the tape to improve your (发音).
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