单项选择题
1、下列各组气体中，既能用浓硫酸干燥又能用碱石灰干燥的一组是（　　）



2、Although Rosemary had suffered from a serious illness for years, she lost __ of her enthusiasm for life.
A．some
B．neither
C．none
D．all


3、 棉花种植从广东扩展到我国淮河流域的时间是（　　）
A．唐朝
B．南宋
C．元朝
D．明朝


4、阅读下列短文，回答题。
     Moods, say the experts, are feelings that are likely to become fixed, having effects on one' s out-look ( way of looking at things ) for hours, days or even weeks． That' s great if your mood is a pleasant one, but a problem if you are sad, anxious, angry or simply lonely．
      Perhaps the best way to deal with such moods is to talk them out;sometimes, though, there is noone to listen． Modern pharmacology (药物学) offers a lot tranquilizers (镇定剂 ) and anti-anxietydrugs． What many people don' t realize, however, is that scientists have discovered the effectivenessof several non-drug methods to make you free from an unwanted mood． These can be just as useful asdrugs, and have the added benefit of being nonpoisonous． So next time you feel out of sorts, don' thead for the drug store--try the following method．
      Of all the mood-changing self-help techniques, aerobic exercise seems to be the best cure for abad mood． "If you could keep the exercise, you' d be in high spirits, "says Kathryn L．ance, author ofRunning for Health and Beauty．
      Researchers have explained biochemical and various other changes that make exercise comparefavorably to drugs as mood-raiser． Physical work such as housework, however, does little． The key isaerobic exercise--running, cycling, walking, swimming, or other repetitive and sustained activitiesthat increase the heart rate and circulation(循环), and improve the body's use of oxygen． Do themfor at least 20 minutes a time,three to five times a week．
What is the main subject of the passage?
A．How to beat a bad mood．
B．How to talk bad moods out．
C．How to do physical exercises．
D．How to do aerobic exercise．


5、
A．1
B．2
C．3
D．4


6、 下列函数中既是奇函数，又在区间(0，+∞)内单调递增的是
A．y=sinx
B．y=-x²
C．y=xlg2
D．y=-x³


7、 已知圆：x²+y²=5与直线：x-2y+m=0相切，则实数m的值为



简答题
8、(12分)如图所示，电阻为r=0.30Ω，质量m=0.20 kg的金属棒CD垂直跨在位于水平面上的两条平行的光滑导轨上，导轨与金属棒接触良好，导轨的电阻不计。导轨左端接有电阻R=0.50Ω和电压表。当金属棒在水平拉力F作用下向右以速度v=2.0 m／s匀速运动时，电压表的示数为1.0 V。若导轨处在方向竖直向下的匀强磁场中，求：

(1)水平拉力F的大小。
(2)若突然撤去水平力，此后在电阻R上产生的电热是多少?


9、阅读下列短文，回答题。
提示：原本擅长化学的Cathy考试时因粗心漏做一页试题。她正闷闷不乐时遇见了Mary。
( Mary = M ; Cathy = C )
M : Hi, Cathy, you don' t look happy． 51 ?
C : I didn' t do well in the chemistry test．
M:Really? I could hardly believe it． Everyone knows you are 52 ．
C : But this time 53 ．
M : What happened?
C : I missed 54 ．
M : What a pity ! So 55 next time !
C : Yes, I will．
第51题  ________


10、阅读下面的材料，根据要求作文。
一个男人来到一家婚姻介绍所，进了大门后，迎面又见两个小门，一扇门上写着：美丽的；另一扇门上写着：不太美丽的。男人推开“美丽”的门，迎面又是两扇小门，一扇门上写着：年轻的；另一扇门上写着：不太年轻的。男人推开“年轻”的门，迎面又是两扇小门……
一路往前走，男人推开了美丽、年轻、善良、温柔、有钱、忠诚、勤劳、文化程度高、身体健康、有幽默感等九道门。当他推开后一扇门时，门上写着一行字：您追求的过于完美了，请您到大街上去找吧。原来，他已经走到了婚姻介绍所的后门。
故事中的男人是追求“完美”的，这引发你想些什么呢?请以“完美”为话题写一篇不少于600字的文章。
要求：题目自拟，立意自定，文体自选(诗歌除外)。

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