题目内容
设函数y=y(x)由方程ylny-x+y=0确定，判断曲线y=y(x)在点(1，1)附近的凹凸性．
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人类教育赖以存在和发展的决定性力量是（）。
1．该工程的工程预付款是多少万元，应扣留的保留金为多少万元2．第一个月到第三个月监理工程师各月签证的工程款是多少，应签发的付款凭证金额是多少万元3．合同终止时业主已支付施工单位各类工程款多少万元4．合同终止后施工单位提出的补偿要求是否合理，业主应补偿多少万元5．合同终止后业主共应向施工单位支付多少万元的工程款
Color is very important to most animals for it helps them to get along in the world. Color (21) to make an animal difficult for its enemies to (22) . Many animals match their (23) so well that as long as they do not move no one is (24) to see them. You probably have often "jumped" a rabbit. If you (25) , you know how the rab- bit sits perfectly still (26) you are just a few feet away. You (27) see the rabbit till it runs for its (28) matches very closely the place where it is (29) . Many times you may have walked past a rabbit (30) didn’t run and you never knew it was there at all.One of the most usual color schemes that helps animals to keep (31) being seen, is a dark back and light underpants. If an animal is the same color all (32) , there is always a dark shadow along the animal’s belly (腹部). (33) an enemy couldn’t see the animal he could see this dark shadow. The shadow makes the animal (34) out to view. But if the belly is (35) than the rest of the animal, the shadow will not be noticed. 32（）
一般来说，儿童期、青年期和成人发生的肿瘤在组织学类型上各有哪些特点？
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