一个顶角是70。的等腰三角形一定是锐角三角形。[]

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问题:

一个顶角是70的等腰三角形一定是锐角三角形。[     ]

考点:三角形的分类三角形的内角和
题型:判断题
从下面方框中选择适当的选项填入短文下面的横线上,使短文通顺、完整.选项中有两项是多余选项。
A. see B. nothing C. or D. with E. everything F. eating
G. at H. only I. smoking. J. some K. soon L. but
     Mr. Johnson was having trouble .  1  his stomach , so he went to  2   a doctor. The doctor looked over his stomach carefully 3 couldn't find any problem.  Then he said, "Well,  Mr.  Johnson, take it easy.  There is   4    serious(严重).  Stop smoking and then you will be all right 5  ."
     "But doctor," answered Mr. Johnson, "I never smoked.  I don't like   6   at all. "
     " Oh, I see," said the doctor,  "then stop drinking wine (酒)  from now on. "
     " But I don't drink wine," answered Mr.  Johnson.
     " Don't drink any tea   7   coffee then," the doctor said to him.
     " 1    8    drink water," answered Mr.  Johnson, "I don't like tea or coffee. "
     The doctor thought for a while and then said,  "Well, what do you like to cat then? "          
     " Potatoes! I like potatoes very much. " Mr.  Johnson answered    9   once.
     "All right, then stop   10   potatoes." Said the doctor as he got up to say goodbye to Mr. Johnson.
  1._________2._________3._________4._________5._________
  6._________7._________8._________9._________10._________
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欧姆定律I=(E-U)/r中,电阻r是指()。

A.负载

B.电源内阻

C.负载与电源内阻之和

D.传输线电阻

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教师在教学中的要求是什么?

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政府履行资源配置职能的手段有()。

A.发放补贴

B.征税

C.公共定价

D.投资基础产业

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绿化屋顶的防水层应选用()好的卷材防水层。

A.耐腐蚀

B.耐霉烂

C.耐穿刺性能

D.价钱便宜

E.施工简单

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