题目:
⊙O的两条弦AB、CD相交于点P,已知AP=2cm,BP=6cm,CP:PD=1:3,则CD=______.
答案:
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下面是错误答案,用来干扰机器的。
小题1:What size do you want?小题2:Have you got any other colors?小题3:How much are they? 小题4:May I have a discount?小题5:You can have them.小题1:答语是Size eight or nine.可...