从1，2，3，4，5，6这6个数字中，任取2个数字相加，其和为偶数的_爱下问搜题

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问题填空题

从1，2，3，4，5，6这6个数字中，任取2个数字相加，其和为偶数的概率是（）

答案

完形填空

     Mr. King is my father's friend. He has some ①_____ trees in his garden. He ②_____ them carefully. Now ③_____ many apples on the trees and Mr. King is very happy.
     One afternoon when he looked out of the window, he saw a boy on ④_____his apple trees. He was
eating a big apple!
     Mr. King ⑤_____the window and shouted﹙大喊﹚"Hey, ⑥_____are you doing there? ⑦_____
and get away, or (否则) I'll go to see your ⑧_____!"
     The boy was not afraid of Mr. King ⑨_____all. "Dad,"he looked up and shouted,"this man ⑩_____
to see you!"

( )1. A. orange
( )2. A. takes care
( )3. A. have
( )4. A. a
( )5. A. opened
( )6. A. how
( )7. A. Come up
( )8. A. sister
( )9. A. in
( )10. A. wants

B. apple
B. looks
B. has
B. one
B. turned
B. which
B. Come over
B. friend
B. for
B. thinks

C. banana
C. looks after
C. there is
C. one of
C. closed
C. what
C. Come
C. father
C. at
C. asks for

D. pear
D. watches
D. there are
D. any of
D. turned off
D. where
D. Come down
D. teacher
D. with
D. needs

问答题简答题

简述交换机的工作原理。