二进制数110011(2)转化为十进制数为( )
A:51
B:50
C:49
D:19
(Ⅰ)求 cos(7π12−x) 的值;
(Ⅱ)求 sin2x+2sin2x1−tanx 的值.
(____)1. A. school B. plane C. ship
(____)2. A. take B. pick C. train
(____)3. A. skate B. book C. jump
(____)4. A. near B. why C. who
(____)5. A. clothes B. prince C .fairy
品味下列句子,注意加线词语,思考其中蕴含着作者怎样的人生感悟。
这些芝麻绿豆般的小事是不折不扣的身边琐事,使我终生受用不尽。
Bob has got good exam results. His parents are proud of his ______.