已知球的直径SC=4，A，B是该球球面上的两点，AB=，，则棱锥S—ABC的体积为
找出划线部分发音与其他三项发音不相同的单词（ ）
duck
sunny
lunch
sugar
some
sure
sister
sock
English
sing
nothing
long
angry
fact
game
hand
Hi， Diana， how was your summer holiday？
________! I had a good time in the sea．（ ）
Good idea
Wait a minute
Not too bad
Pretty good
，
，则棱锥S—ABC的体积为
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