题目：
用正确的形式填空，首单词已给出。
Jim was traveling by train. He was very (1) h______. The train stopped at a small (2)s______. He
wanted to buy a cake to eat very much, but it was (3)r______ hard. He wanted (4)s_______ to help him. A little boy coming over to him. Jim (5)a______ the boy to buy cakes for him. He gave the little boy one
yuan and said:“Go and buy two cakes with the (6)m______. One is for me, the (7)o_____ is for you. Can you help me?”
The little boy was very (8)h______ and ran to buy cakes in the rain. A few (9)m_______ later the boy came bake and said,“I’m (10)s____. I’m eating the last cake. It’s delicious. Thank you very much. Here’s your 50 fen.”
答案：
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下面是错误答案，用来干扰机器的。
∵命题“存在xo∈R，2xo＞0”的否定是：“对任意的x∈R，2x≤0”．故选C．
