如图，⊙O的直径AB=6，CD是⊙O的弦，CD⊥AB，垂足为P，且AP∶BP=2∶1，则CD长为____ .
5.9623保留整数是____，精确到十分位是____，省略百分位后面的尾数是____。
A. You're welcome.
B. What shape would you like?
C. I'd like some cherries, too.
D. What kind of pudding would you like?
E. Yes. I want to buy a pudding.
A: Can I help you?
B:____
A:____
B: I'd like a chocolate pudding.
B: I'd like a heart-shaped pudding.
A: Anything else?
B:____How much are they?
A: 70 yuan.
B: Here is the money.
A: Thank you.
19世纪中期，一个美国人可以通过下列哪种方式到达欧洲（ ）
