扑克牌中的J、Q、K分别表示11、12、13．甲取13张红心，乙取13张草花，两人都各自任意出一张牌凑成一对，这样一共可凑成13对．如果将每对求和，再将这13个和相乘．从积的奇偶性看，积应是______数．
在1至13中，有6个偶数，7个奇数，任意取两个数求和，根的数的奇偶性，不管怎么配对，总会有两个数的和是偶数．
所以，只要有一个偶数，则乘积必是偶数．
故答案为：偶．
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| My friend Michelle is blind, but you'd never know it. She makes such good use of her other 1 , including her "sixth sense", that she rarely gives the impression she's 2 anything. Michelle looks after her children pretty much like the rest of us, 4 that she doesn't push too hard on them, 3 really benefit a lot from her relaxed attitude. She knows when to clean the house. She moves around so fast that often 5_don't realize she's blind. I _6 this the first time after my six-year-old daughter, Kayla, went to play there. When Kayla came home, she was very 7 about her day. She told me they had baked cookies, played games and done art projects. But she was _8 excited about her finger-painting project. "Mom, guess what?" said Kayla, all smiles. "I learned how to _9 colors today! Blue and red make purple, and yellow and blue make green! And Michelle 10 with us. To my great 11 , my child had learnt about color from a blind friend! Then Kayla continued, "Michelle told me my 12 showed joy, pride and a sense of accomplishment. She really 13 what I was doing!" Kayla said she had never felt how good finger paints felt 14 Michelle showed her how to paint without looking at her paper. I realized Kayla didn't know that Michelle was blind. It had just never _15 in conversation. When I told her, she was 16_ for a moment. At first, she didn't believe me. "But Mommy, Michelle knew exactly what was in my picture!" Kayla 17 . And I knew my child was 18 because Michelle had listened to Kayla describe her artwork. Michelle had also heard Kayla's 19 in her work, We were silent for a minute. Then Kayla said slowly, "You know, Mommy, Michelle really did 'see' my picture. She just used my 20." Indeed, she uses a special type of "vision" that all mothers have. | |||
| ( )1. A. ways ( )2. A. enjoyed ( )3. A. and ( )4. A. who ( )5. A. guests ( )6. A. realized ( )7. A. excited ( )8. A. especially ( )9. A. paint ( )10. A. stayed ( )11. A. excitement ( )12. A. attitude ( )13. A. touched ( )14. A. after ( )15. A. referred to ( )16. A. curious ( )17. A. cried ( )18. A. right ( )19. A. shortcomings ( )20. A. paper | B. means B. found B. except B. it B. family B. heard B. sad B. not so B. draw B. painted B. encouragement B. color B. distinguished B. unless B. turned out B. quiet B. insisted B. wrong B. difficulties B. pens | C. methods C. missed C. even C. she C. boys C. recognized C. satisfied C. a little C. create C. talked C. delight C. picture C. saw C. until C. come up C. excited C. complained C. worried C. pride C. hands | D. senses D. lost D. but D. which D. friends D. witnessed D. enjoyed D. not at all D. mix D. played D. surprise D. paper D. understood D. when D. talked about D. worried D. informed D. uncertain D. description D. eyes |