在△ABC中,若sin2A+sin2B<sin2C,则△ABC的形状是[ ]
A.锐角三角形
B.直角三角形
C.钝角三角形
D.不能确定
答案:C
One minute she burst into _______, and the next she burst out ______.We just couldn’t catch her mood at any moment.
A.crying, laughter
B.tears, laughing
C.tears, laughter
D.crying, laughing
第②段在全文结构上有什么作用,