如图,点A、B、C都在圆O上,若∠AOB=68°,则∠ACB的度数为( )
A:68°
B:60°
C:34°
D:22°
That amusement park has lots of tourists during the holiday.(就划线部分提问)
____ ____ that amusement park have lots of tourist?
阅读课文《鲸》,填空:
①鲸其实不属于鱼类,而是____动物。
②鲸的种类很多,总的说来可以分为两大类:一类是____,没有____;一类是____,有____。