问题 填空题

利用计算器计算sin29.5°-cos58°30″+tan52°30′=______.(精确到0.01)

答案

原式≈(0.165)2-0.5225+1.303≈0.0272-0.5225+1.303≈0.81.

故答案为0.81.

单项选择题
完形填空
完形填空
Dear friends,
     Do you   1    you are lucky when you are sitting in the bright   2   and having your classes or enjoying
your nice food at home? Do you feel many children in Haiti(海地) are very    3    too? We know an
earthquake(地震) happened in Haiti on January 12th, 2010. Many people died(死去). Lots of
children don’t have enough    4   to eat, and they   5    go to school now.
     They need our help. So we’d like to collect   6   and clothes for them. You can donate your old pens,
rubbers, rulers, pencil-boxes or old clothes. And you can also donate some    7   . We will    8    them
to the children in Haiti.
     We hope to raise more than10,000 yuan, then we can help 50 students to go back    9    school. If
you would like to donate things, please   10   us on 83301666. Thank you.
                                                                                                          Gao Shan and her classmates
( )1.A. think
( )2.A. bedroooms
( )3.A. happy
( )4.A. food
( )5.A. must
( )6.A. toys
( )7.A. pens
( )8.A. ask
( )9.A. for
( )10.A. e-mail
B. want
B. classrooms
B. young
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B. can't
B. stationery
B. notebooks
B. raise
B. in
B. visit

C. have
C. shops
C. poor
C. clothes
C. can
C. drinks
C. clothes
C. send
C. on
C. write


D. see
D. kitchens
D. lucky
D. Coke
D. may
D. stickers
D. money
D. pass
D. to
D. call