A:①②③④
B:②③④⑤
C:①②④⑤
D:①③④⑤
已知A1,A2为椭圆x24+y2=1的左右顶点,在长轴A1A2上随机任取点M,过M作垂直于x轴的直线交椭圆于点P,则使∠PA1A2<450的概率为( )
读一读,连线。
①What can you see?____ A. It's green.
②What colour is it?____ B. OK, Mum.
③Put the box on the desk. ____ C. Yes, please.
④Chopsticks?____ D. I can see a slide.
为服务,迎接上海世博会,组委会向社会招募了大量懂英语的志愿者,因为英语是( )