单项选择题
1、 (    )
 

2、
A．y²=-4x
B．y²=-8x
C．y²=-9x
D．y²=-18x


3、 揭开国共两党由内战到合作抗日序幕的是（　　）
A．中共发表《八一宣言》
B．瓦窑堡会议的召开
C．西安事变的和平解决
D．国民政府发表自卫宣言


4、通读下面的短文，回答题。
     The sea is very big． Look at a map of the world． There is less land than sea． The sea covers three
quarters of the world．
     The sea is very deep in some places． There is one spot, near Japan, where the sea is nearly 11kilometres deep． The highest mountain in the world is about 9 kilometres high． If that mountain were put into the sea at that place, there would be 2 kilometres of water above it．
      If you have swum in the sea, you know that it is salty． You can taste the salt． Rivers, which flow into the sea, carry salt from the land into the sea． Some parts of the sea are less salty than other parts． There is one sea, called the Dead Sea, which is very salty． Because it is very salty, swimmers cannot sink! Fish cannot live in the Dead Sea．
      In most parts of the sea, there are plenty of fishes and plants． Some live near the top of the sea． others  live deep down． There are also millions of tiny living things that float in the sea． These floating things are very small． It is hard to see them． Many fish live by eating them．
      The sea can be very cold． Divers, who dive deep down in the sea, know this． On the top the
     Water  may be warm． When the diver goes downwards, the sea becomes colder and colder．
     Another thing happens． When the diver goes deeper, the water above presses down on him． It Squeezes  him． Then the diver has to wear clothes made of metal．
One spot of the sea near Japan is
A．nearly nine kilometres deep
B．Mmost eleven kilometres high
C．two kilometres above the highest mountain in the world
D．two kilometres deeper than the height of the world' s highest mountain


5、 下列物质分别与硝酸反应时，硝酸既表现酸性又表现氧化性的是(  )
A．FeO
B．CuO
C．C
D．NaOH


6、 He has told me he __________ the expensive dress for two years.
A．has had
B．bought
C．have been
D．has bought


7、 Not a single mistake _______ in the test.
A．he made
B．did he make
C．he has made
D．made he


填空题
8、 A、B、C三种短周期元素是同一周期中的相邻元素，A的价氧化物的化学式是A₂O．11·6gB元素的氢氧化物恰好能与200 mL 2 moL／L的盐酸完全反应，B原子核中质子数与中子数相等．则B元素的符号是____．A、C两元素的氧化物的水化物相互反应的离子方程式为_________


9、 氢原子的古典模型为一个电子绕着原子核中的质子做圆周运动．设质子不动，质子和电子的电荷大小为g，静电子常数为k，圆周半径为r，电子质量为m，则电子的动能Ek=____，电子运动的速度v=____(用q、k、r、m表示)．


简答题
10、
(I)求AABC的面积；
(II)若M为AC边的中点，求BM．

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