单项选择题
1、 不等式2≥6-x2的解集是
A．[-2,3]
B．
C．[-3,2]
D．


2、 为了保护自然资源和生态环境而采取的下列措施中，不可取的是（　　）
A．三江平原禁垦荒地
B．东北林区限采伐重营造
C．内蒙古西部退耕还草
D．南方地区禁采有色金属矿


3、 At the foot of the mountain
A．a village lie
B．lies a village
C．does a village lie
D．lying a village


4、! don' t remember who spoke first that night, but all of us__________ the same opinion．
A．are expressing
B．have expressed
C．expressed
D．express


5、 Studies will be needed to see if the medicine has any__________ on the disease．
A．wealth
B．effect
C．price
D．market


6、 X、Y、Z三种元素的原子具有相同的电子层数，它们的价含氧酸的酸性强弱顺序是H₃XO₄2YO₄4．则下列说法正确的是（　　）
A．原子序数X>Y>Z
B．原子半径XC．气态氢化物的稳定性H₃X>H₂Y>H₂
D．元素的非金属性X

7、通读下面的短文，回答题。
I once went to a town in the north of England on business.
It was about 7:30 in the evening when I reached the hotel. The manageress, a strict old lady of about 60, showed me to my room. When I asked her what time dinner was,she said there was only one sitting at 6:30,and I had ____21____ it. " Never mind," I said," I'm not very ____22____ I'll just have a drink in the bar and a sandwich. "
"Bar!" she raised her voice. "This is a respectable hotel, young man. If you want ____23____, you must go somewhere else. " She spoke ____24____ a glass of beer was dangerous drug.
I went to a bar and had some beer and sandwiches and then went to the cinema. At about 11:30I returned to the hotel. Everything was in darkness. I knocked at the door,but nothing happened. The ____25____ sound was the church clock opposite, which suddenly struck the half-hour with such force that it made me jump,____26____ a window opened upstairs. The old lady looked out and asked me what was going on. I explained who I was and she let me ____27____ waiting tbr another ten minutes. She was in her nightdress. She told me seriously that guests were expected to be back in the hotel by 11 o' clock.
I went to bed but could not sleep. Every quarter of an hour the church clock struck and at midnight the whole hotel shook with the noise. Just before dawn,I finally ____28____.
When I arrived at ____29____,everyone else had nearly____ 30____ and there was not enough coffee to go round. "Did you ____31____ well,young man?" the old lady asked. " ____32____,I don't think I could go through ____33____ night in that room," I replied. "I hardly slept at all. "
"That's because you were ____34____ all night drinking!" she said angrily, putting____ 35____ to the conversation.
________
A．had
B．passed
C．missed
D．caught


填空题
8、如图5-6所示，一质量为m的小车，以速度v在光滑水平面上直线行驶．现有质量为M/4的重物，以水平速度2v迎面投到车上，后相对于车静止．车和重物共同运动的速度为____．在此过程中因摩擦所产生的热量是____．



9、 如图4-7所示，矩形区域ABCD内有一磁感应强度为B的匀强磁场，磁场内有一长为l₁，宽为l₂，电阻为R的小矩形线框abcd，线框平面与磁场垂直，cd边和CD边互相平行．若使线框沿其平面以垂直cd边的速度v平移出磁场，则线框中感应电流持续的时间t为______；电流的大小为______，方向______．(填“顺时针”或“逆时针”．)



简答题
10、
(I)求椭圆方程；

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