以下说法，正确的是（ ） A．少生优生，幸福一生 B．反正只想生一个孩子，晚生不

（）是指男女双方或一方缺乏结婚的真实意思，因受他方或第三方胁迫或被非法限制人身自由而结合的违法婚姻。

A.事实婚姻

B.无效婚姻

C.可撤销的婚姻

D.重复婚姻

让患者配对相同物品，如两枚别针、钥匙、钢笔放在一起，让患者配对，患者不能完成，该患者可能为（）

A.触觉失认

B.物品失认

C.视空间失认

D.颜色失认

E.形状失认

甲针对某件发明专利提出了无效宣告请求，主张(1)产品广告页A1和销售发票A2证明该专利无新颖性，(2)对比文件D1证明该专利无新颖性，(3)对比文件D1和D2的结合证明该专利没有创造性。专利复审委员会经审查认定：A1和A2不能证明该专利无新颖性；D1、D2均不能破坏该专利的新颖性；D1、D2及其结合均不能破坏该专利的创造性，故作出维持专利权有效的决定。该审查决定生效后，在满足其他受理条件下，针对该发明专利再次提出的下列哪些无效宣告请求，专利复审委员会将予以受理

A．甲以产品广告A1和产品出库单B1相结合证明该专利无新颖性

B．乙以对比文件D1证明该专利无新颖性

C．乙以对比文件D1和对比文件D3结合证明该专利无创造性

D．甲以对比文件D2和对比文件D3结合证明该专利无创造性

若N_A代表阿伏加德罗常数，则下列叙述中，正确的是[ ]

A. 一定条件下，足量铜与200 g 98%的浓硫酸充分反应，转移电子数目为2N_A

B. 16 g氧气和臭氧的混合物中含有的氧原子数为N_A

C. 1 L 0.5 mol/LNa₂CO₃溶液中含有的CO₃^2-数为0. 5N_A

D. 78g Na₂O₂中所含阴离子的数目是2N_A

Two scientists in California now think they can find out a person’s real age.Jeffery Bada and Patricia Masters do chemical tests on teeth.When we are born the amino acids（氨基酸）in our teeth are in one form.Then，as we grow older these amino acids change into a second form.Every year，one thousandth of the amino acids changed.So，by testing just one tooth and counting the number of amino acids in each form，Bada and Masters can work out a person’s age.They tested a tooth from the body of an Eskimo（爱斯基摩人）woman who died 1 600 years ago.From the appearance of her body，she was between 50 and 60 years old when she died.The tooth test put her age at 53.Then the Russian Government sent them a tooth from an old man in Georgia.The tooth said she was 99.Her real age was 96.The Russians are now hoping to send more teeth，from the very old people without birth certificates（出生证明书）.But there are problems.Some of the centenarians（百岁老人）have lost all their teeth.The others want to keep their teeth until they drop out naturally.So the Russian Government and the American scientists have to wait and hope.

61.Jeffery Bada and Patricia Masters believe that they can tell a person’s age according to_______.

A.an experiment on his bone

B.the shape and condition of his teeth

C.a test on the amino acids within his body

D.the changing form of amino acids in his teeth

62.According to the passage，which of the following statements is true?

A.The amino acids in an adult’s teeth may differ from those in a baby’s.

B.The number of amino acids in a 20-year-old man is different from that when he was seven.

C.Amino acids in one teeth changes without affecting their forms.

D.Scientists now can tell how long a person will live by testing his teeth.

63.Why are the two scientists asked to find out some very old Russians’ age?

A.Because the Government wants to know how long these old people can live.

B.Because they have no birth certificates.

C.Because people who have tooth problems tend to live longer.

D.Because the Government wants to know their dates of birth and death.

64.In order to find out the exact age of some people over 100，both the Russian Government and American scientists_______.

A.should wait until all of them die

B.should pull out one of their teeth

C.have to wait for their teeth to drop out naturally

D.want to have their teeth pulled out

65.The central idea of the passage is_______.

A.the relationship between people’s teeth and ages

B.the relationship between amino acids and teeth

C.the contradiction（矛盾）between scientists and patients

D.the contradiction between the Government and the scientists