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【单选题】
下列选项中,关于海绵描述正确的是哪一个?()
A.
海绵是一种多细胞植物
B.
海绵可以与俪虾共生
C.
海绵可以漂浮在海面上无根存活
D.
海绵的种类有1000多种
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参考答案:
举一反三
【单选题】听力原文: It would seem that there are three kinds of travel books. The first are those that give a personal, subjective account of travels which the author has actually made himself. If they are informat...
A.
Two.
B.
Three.
C.
Four.
D.
Five.
【简答题】已知:如图,在正方形ABCD中,E是CB延长线上一点,EB= 1 2 BC,如果F是AB的中点,请你在正方形ABCD上找一点,与F点连接成线段,并说明它和AE相等的理由. 连接______,则______=AE.
【简答题】But those kinds of plates are not very good for the _ (environment).
【简答题】如图,已知正方形ABCD,点E是BC上一点,点F是CD延长线上一点,连接EF,若BE=DF,点P是EF的中点. 小题1:求证: 平分 ; 小题2:若 ,求 的面积.
【简答题】如图,已知正方形ABCD的面积是 cm 2 ,依次连接正方形的四边中点E、F、G、H得到小正方形EFGH.求这个小正方形EFGH的边长(结果保留两个有效数字)。
【简答题】如图,已知正方形ABCD,点E是BC上一点,点F是CD延长线上一点,连接EF,若BE=DF,点P是EF的中点. (1)求证:DP平分∠ADC; (2)若∠CEF=75°,CF= ,求△AEF的面积.
【单选题】To my surprise, I never thought I ______ those kinds of books. [     ]
A.
was of benefit to
B.
was beneficial to
C.
benefited from
D.
benefited
【简答题】如图,已知正方形ABCD中,E、F分别是BC、CD上的点,且AF平分∠DAE.求证:AE=DF+BE.
【单选题】听力原文: It would seem that there are 3 kinds of travel books. The first are those that give a personal description of travels which the author has actually made himself. If they are informative and have...
A.
2.
B.
3.
C.
4.
D.
5
【简答题】已知:如图,在正方形ABCD中,E、F分别是BC、DC 边上的点,且AE⊥EF于点E。 (1)延长EF交正方形ABCD的外角平分线CP于点P,试判断AE与EP的大小关系,并说明理由; (2)在AB边上是否存在一点M,使得四边形DMEP 是平行四边形?若存在,请给予证明;若不存在,请说明理由。
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