若角α的终边经过点P(﹣1,2),则sin2α=____
我们不必爱护专门为残疾人和老年人设置的设施,因为我们用不上。( )
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A. The boy is going to the park.
B. Some newspapers are flying away.
C. The balloons are flying away.
D. These boys are playing football.
E. They are going to go to the park tomorrow.
翁森在《四时读书乐》中写道,春季“读书之乐乐何如?绿满窗前草不除”。夏季“读书之乐乐何如?“要琴一曲来熏风”。秋季“读书之乐乐何如?起弄明月霜天高“。冬季“读书之乐乐何如?数点梅花天地心”。对此理解正确的是( )