6.下列因果关系成立的是

A．因为NH₃的水溶液可以导电，所以NH₃是电解质

B．因为SO₂可以使溴水褪色，所以SO₂具有漂白性

C．因为某碱性溶液的焰色呈黄色，所以其溶质为NaOH

D．因为Al能与强碱溶液反应，所以Al有一定的非金属性

5. 下列离子反应方程式正确的是　　　

　　　 A．用两个铜电极电解食盐水：2Cl^-+2H₂O ==== 2HO^-+H₂↑+Cl₂↑

　　　 B．腐蚀法制作印刷线路板：Fe³⁺+Cu====Fe²⁺+Cu²⁺

　　　 C．Ca(HCO₃)₂溶液中加入过量KOH溶液：Ca²⁺+HCO₃^-+OH^-= CaCO₃↓+H₂O

　　　 D．AlCl₃溶液呈酸性的原因：Al³⁺+3H₂O　　　 Al(OH)₃+3H⁺

4.标准状态下，在四个干燥的烧瓶中分别充入：① 纯净的氨气，② 混有1/3体积空气的氯化氢气体，③ 纯净的NO₂气体，④ 混有少量O₂的NO₂气体。然后各做喷泉实验。实验后，三烧瓶中溶液的物质的量浓度大小关系是

　A. ①=②=③=④　　 B. ①=②=③>④　　 C. ①=②=③<④　　 D. ④>①=②>③

3.用下列实验装置完成对应的实验，能达到实验目的的是　

2.下列各组离子一定能大量共存的是

A．在含有大量AlO₂^－的溶液中：NH₄⁺、Na⁺、Cl^－、H⁺

B．在强碱溶液中：Na⁺、K⁺、CO₃^2－、NO₃^－

C．在pH＝12的溶液中：NH₄⁺、Na⁺、SO₄^2－、Cl^－

D．在c(H⁺)＝0.1mol·L^－1的溶液中：K⁺、I^－、Cl^－、NO₃^－

1.广口瓶被称为气体实验的“万能瓶”，是因为它可以配合玻璃管和其它简单仪器组成各种功能的装置。下列各图中能用作防倒吸安全瓶的是　　　　　　　　

104. --- “Where have you been?”　 --- “I got caught in traffic; otherwise _____ sooner.”　 A. I would be here　　　　　　　　　　　　　　 B. I have been here　 C. I had been here　　　　　　　　　　　　　　　D. I would have been here　 105. If it were not for the fact that you _____ ill, I would ask you to do this right now.　 A. were　　　　　B. had been　　　　　　　　　 C. are　　　　 D. should be

86. The suggestion has been made _____ the basketball game _____ put off.　 A. for; to　　　　　B. that; be　　　　　 C. which; should beD. to; being　 87. The order came that the medical supplies _____ to Beijing for the Sars soon.　 A. would be sent　　B. should send　　　　C. be sent　　　　 D. must be sent　 88. It is important that we _____ wild animals.

A. will protect　　　 B. should protect　　C. shall protect　　D. are protecting　 89. Had you listened to the doctor, you _____ all right now.　 A. are　　　　　　　 B. were　　　　　　　 C. would be　　　　 D. would have been　 90. _____ any change about the date, please tell me immediately.　 A. Will there be　　 B. Should there be　　 C. There will be　　 D. There should be　 91. _____ today, he would get there by Friday.　

A. Would he leave　　　　　　　　　　　　　 B. Was he leaving　 C. Were he to leave　　　　　　　　　　　　D. If he leave　 92. Should it rain, the crops _____ .　 A. would be saved　　　　　　　　　　　　　B. would have been saved　　　 C. will be saved　　　　　　　　　　　　　　D. had been saved　 93. You _____ come earlier. The bus left a moment ago.　 A. would　　　　　　B. should have　　　　　C. may　　　　　　　D. have　 94. He treated me as though/as if _____ his own son.

A. I am　　　　　　　B. I would be　　　　　 C. I was　　　　　　D. I were　 95. I _____ you some money, but I hadn’t any on me then.　 A. would lend　　　 B. would have lent　　 C. could lend　　　 D. may have lent　 96. A few minutes earlier and we _____ the rain.

A. have caught　　　 B. had caught　　　　　 C. could have caught　D. were to catch　 97. --- “Have you ever been to Beijing?”　　　　　　　 　 --- “No, but I wish I _____”　 A.have　　　　　　　　B.will　　　　　　　　C. do　　　　　　　　D. had　 98. I’m glad I went over all my notes; otherwise _____ .　 A. I may have failed　　　　　　　　　　　 B. I’d fail　

C. I’d have failed　　　　　　　　　　　　 D. I’ll have failed　 99. --- “What will you do during the summer holiday?”　 　 --- “I don’t know, but it’s high time _____ something.”　 A. I’m deciding　　　 B. I’ll decide　　　C. I decided　　　 D. I decide　 100. What should we do if it _____ tomorrow?　 A. should snow　　　　　B. would snow　　　　 C. snow　　　　　 D. will snow　 101. If only I _____ my watch!　

A. hadn’t lost　　　　 B. haven’t lost　　 C. didn’t lost　D. don’t lose　 102. You _____ such a serious mistake if you had followed his advice.　 A. may not make　　　　　　　　　　　　　　　B. might not make　 C. shouldn’t have made　　　　　　　　　　　D. might not have made　 103. We _____ the work on time without your help.　 A. hadn’t had finished　　　　　　　　　　　 B. didn’t have finished　 C. couldn’t have finished　　　　　　　　　　D. can’t have finished

83. He is talking so much about America as if he _____ there.　 A. had been　　　　　 B. has been　　　　　　C. was　　　　　 D. has gone　 84. The young man insisted that he _____ nothing wrong and _____ free.　 A. did; set　　　　　　　　　　　　　　　　　B. had done; should be set　　　 C. should do; be set　　　　　　　　　　　　 D. had done; must be set　 85. I suggested there ____ be a kind of language all could understand and use ____ .　 A. can; it　　　　　B. /;　 /　　　　　　　　C. would; it　　　 D. may;　 /

81. The teacher demanded that the exam _____ before eleven.　 A. must finish　　　 B. would be finished　 C. be finished　　 D. must be finished　 82. She made the demand that the journalists _____ at once ______ Iraq.　 A. leave; for　　　　B. leave; to　　　　　 C. left; to　　　　 D. to be left; for