题目列表(包括答案和解析)
25. Cloning humans has been _____ in the science world for many years and it is likely that it
will continue to be.
A. ridiculous B. contemporary C. controversial D. conventional
24._______ of time and energy has been spent in making the earthquake-stricken areas a permanent museum to remind people how disastrous a natural disaster can be.
A. A great number B. A great deal C. A great many D. A plenty
23. They’ll start their project, _____at helping the poor children to be educated in the west of China.
A.aims B.aiming C.being aimed D.to aim
22. Many people agree that ____ knowledge of English is ___ must in international travel today.
A. the, \ B. a , the C. a, a D. the, a
第一节:单项填空(共20小题;每小题0.5分,满分10分)
21.-----Would she mind if she played against her former teammates?
----- _______. She is willing to play against any tough players.
A.I think so. B.I’m not surprised. C.Of course. D.Not likely !
26.小明将一张矩形纸片沿对角线剪开,得到两张全等直角三角形纸片(如图2),量得他们的斜边长为10cm,较小锐角为30°,再将这两张三角纸片摆成如图3的形状,使点B、F、D在同一条直线上,F为公共直角顶点。然后小明又将图(3)中的△ABF沿直线AF翻折到图(4)的位置,点B落在FD边上的B1点,AB1交DE于点H。
请你说明:(1)AH=DH.;(2)点H在∠AFD的角平分线上。
25.如图,在△ABC中, D、E分别是AC、AB上的点, BD与CE交于点O. 给出下列三个条件:①∠EBO=∠DCO;②∠BEO=∠CDO;③BE=CD.
(1)上述三个条件中, 哪两个条件可判定△ABC是等腰三角形(用序号写出所有情形);
(2)选择第⑴小题中的一种情形, 证明△ABC是等腰三角形.
24.如图,在
中,
是
上一点,
交
于点
,
,
,
与
有什么位置关系?证明你的结论.
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