Question

选择题。 函数y=sinα+cosα的图象的一个对称中心是( ) A.(π/4,√2)B.(5

选择题。
函数y=sinα+cosα的图象的一个对称中心是( )
A.(π/4,√2)B.(5π/4，-√二)C.(-π/4，0)D.（π/2,1)

Answer 1

C

追答

过程稍等。

望采纳

Answer 2

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.
打字不易，如满意，望采纳。

Answer 3

选C。提个根号2。。用转换公式

Answer 4

D

Answer 5

C

Answer 6

C