[計量] 請教一些問題...
沒想到寫Q 可以寫得那麼痛苦...
1.
How many five-digit numbers composed of distinct digits begin and end with
odd numbers?
a) 25,000
b) 20,000
c) 12,600
d) 10,080
e) 6,720
ANS. e 可我怎麼想都是b
2.
Rectangle ABCD has AB=4 and BC=3. Segment EF is constructed through B so that
EF 垂直 DB (題目上是DF 可是我覺得應該是打錯?), and A and C lie on DE and DF,
respectively. ←(就是這句讓我覺得前面打錯) What is EF?
a) 9
b) 10
c) 125/12
d) 103/9
e) 12
ANS. c...不會算...
3.
Three distinct vertices of a cube are chosen at random. What is the
possibility that a plane determined by these three vertices contains points
inside the cube?
a) 1/4
b) 3/8
c) 4/7
d) 5/7
e) 3/4
ANS. c....也是不會算...
附帶問一下
Q的題目真的會到這種地步嗎...
開始擔心了= ="
麻煩大家了!!! 謝謝!!!
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◆ From: 140.112.4.170
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※ 編輯: nyyfan0325 來自: 140.112.4.170 (04/02 19:11)
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