已知∠AOB,如图,求作:射线OC,使∠AOC=∠BOC。(保留作图痕迹) 作法

题型:填空题

问题:

已知∠AOB,如图,求作:射线OC,使∠AOC=∠BOC。(保留作图痕迹)

作法:①在OA和OB上,分别截取OD,OE;②分别以D,E为圆心,大于(    )的长为半径作弧,在∠AOB内,两弧交于点C;③作射线(    ),(    )就是所求的射线。

考点:角平分线的性质
题型:填空题

        阅读下面短文把四个句子A-D 填入文中空缺处(1-4),使短文内容完整正确,并完成第5小题。 

        In 1945, China's well-known artist and poem Liao Bingxiong(廖冰兄) held a works(作品)display

in Chongqing. And many poems, artists, writers and other famous persons, 1 , were invited to attend

the first exhibition. During the evening, Guo asked Liao, "Why is your name so strange and why are you

called Xiong?"Hearing the question, Wang stopped Liao and said, "His sister's name is Bing, so his

parents gave him the name Bingxiong." 2  , Guo laughed and said, "Oh, I see, 3  , Shao Lizi's father must

be Shao Li" At that moment, 4  .  

A. everyone present couldn't help laughing too.  

B. including Guo Moruo,Song Yunbin(宋云彬)and Wang Qi(王琦)  

C. and Yu Da-fu's wife must be called Yu Da  

D. As soon as Wang finished talking

5. According to its content, this passage is a ______        

A. story    

B. play  

C. debate    

D. poem

题型:填空题

看到飞来的物体,人立即产生躲避的行为是一种()

A.反射

B.自我控制

C.调试

D.顺应

E.应对

题型:填空题
如图所示,两根相距为l的平行直导轨ab、cd、b、d间连有一固定电阻R,导轨电阻可忽略不计;MN为放在ab和cd上的一导体杆,与ab垂直,其电阻也为R;整个装置处于匀强磁场中,磁感应强度的大小为B,磁场方向垂直于导轨所在平面(指向图中纸面内);现对MN施力使它沿导轨方向以速度v(如图)做匀速运动;令U表示MN两端电压的大小,则(  )

A.U=vBl,流过固定电阻R的感应电流由b到d

B.U=vBl,流过固定电阻R的感应电流由d到b

C.U=vBl,流过固定电阻R的感应电流由b到d

D.U=vBl,流过固定电阻R的感应电流由d到b

题型:填空题

美国秘书的特点包括()。

A.妇女化

B.知识化

C.高薪化

D.高效化

题型:填空题

砖块排列时尽可能采用主规格的砖块,主规格的砖砌块应占总量的75%~80%。

更多题库