一个三角形的两个角分别是2cm、6cm ,它的第三条是【 】 .A.5cm B.4cm C.1cm
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一个三角形的两个角分别是2cm、6cm ,它的第三条是【 】 .A.5cm B.4cm C.1cm
一个三角形的两个角分别是2cm、6cm ,它的第三条是【 】 .A.5cm B.4cm C.1cm
一个三角形的两个角分别是2cm、6cm ,它的第三条是【 】 .A.5cm B.4cm C.1cm
应该是：一个三角形的两个边分别是2cm、6cm ,它的第三条是【 】 .
这个问题要根据三角形的三边关系：任意两边之和大于第三边,两边之差小于第三边.
第三边的范围是：4＜第三边＜8
所以选A.
一个三角形的两个角分别是2cm、6cm ，它的第三条是【 A.5cm 】 。
A.5cm B.4cm C.1cm
BHaving___tests and exams and getting__homework make many studets feel stressed.
A.too much；much too B.too many；too much C.much too；too many D.many too；much too
二.根据首字母提示写出句中所缺单词，使句子意思完整正确
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BHaving___tests and exams and getting__homework make many studets feel stressed.
A.too much；much too B.too many；too much C.much too；too many D.many too；much too
二.根据首字母提示写出句中所缺单词，使句子意思完整正确
It is good for you to read English aloud every day to improve___your English.
2.It is good to share___your problems with others.
3.Millie is sd because she got low marks____in her exams
三.用下面词组的正确形式完成句子
forget about ，stay up late，hand in，deal with，give up，as a result，do well in
People born under Libra like peace and do not like to forget about___others.
2.Mr Hu always reminds us to_hand in_____our homework on time.
3.Some students often_stat up late___to do extra exercises.
4.Don't_give up_____.I'm sure your dream will come true one day.
5.There are many difficulties for us to_deal with____.
6.David is the cleverest students in our class.He_does well in____all the subjects.
7.His robot does all his housework for him._As a result______，he has more free time to relax.
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A,口算:2+1<6. 2+4=6 ,两边之和大于第三边。排除B和C
A
第三边应大于其他两边之差，小于其他两边之和