1. [单选题]下列说法正确的是
A. 核能是指原子核发生变化时所释放的能量
B. 煤炭、石油、天然气、太阳能都是不可再生能源
C. 原子弹和氢弹都是利用核裂变
D. 目前核电站获得核能的途径是核聚变
2. [单选题]下列不属于固定成本的是（ ）。
A. 修理费
B. 利息支出(interest exchange)
C. 折旧费
D. 外购动力费
3. [多选题]②将铁粉和铜粉的混合物放入硝酸银溶液(silver nitrate solution)中，反应结束后，对剩余固体成分的判断正确的是______。
A. 肯定有银
B. 肯定有铜
C. 可能有铁
D. 可能是铁和银
4. [单选题]23．The moon is bright because__________
A. there is some fire 'on it
B. it is near the sun，too
C. there is big mirror on it
D. it can get light from the sun
5. [单选题]BRadio and television are very popular in the world today． Millions of people watch TV．Perhaps more people listen to the radio．The TV is，of course，more useful than the radio． On TV you can see and hear what is hap-pening in the world．Now radio is still with us． And the number of listeners is becoming larger． One reason for this is the invention of the transistor(半导体) radio． A transistor radio is sometimes very small． It is very easy to carry． You can put one in your pocket and listen to it on the bus or on your bike when you go to work． It is better．for blind people． The sight(视力J) of many old peo-ple is not good enough to watch TV． Then，when people are working，they can't watch TV， but they can listen to music or news over the radio． What-s more，radio is much cheaper than TV．
A. Radio and television__________ in the modern world today
C. are both widely used
D. are both expensive
E. have been changed a lot
F. are used for learning things
6. [单选题]．压瘪的乒乓球放入热水中重新鼓起，是因为球内的气体分子
A. 体积增大
B. 质量增大
C. 间隔增大
D. 个数增多
7. [单选题]—Doyouknow________theCapitalMuseum?—NextFriday.
A. whenwilltheyvisit
B. whentheywillvisit
C. whendidtheyvisit
D. whentheyvisited
8. [单选题]6． Henry has two good friends here and he has __________one in London． '
A. the other
B. other
C. another
D. the another
9. [单选题]6． Don-t worry! I-m sure you’ll _________ your classmates if you work hard at your lessons．
A. catch up with
B. agree with
C. get on well with ．
D. make friends with
10. [单选题]下面句子中加粗词语使用正确的一项是( )
A. 看了火箭队和湖人队精彩的比赛，几个NBA球迷正在津津乐道地谈论着巨星姚明的突出表现(distinct manifestation)。
B. 大冬会期间，哈尔滨市实行了交通管制，交通拥堵的状况戛然而止。
C. 春节去海南度假，我们在飞机上俯瞰着祖国的沧海桑田，不由得被眼前的美丽景色所陶醉。
D. 金融危机爆发后，甲型H1N1流感病毒又乘机横行，这对美国来说可真是祸不单行啊！
