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【单选题】
A painting in our local museum has just been shown, by using X-rays, to be recent and thus not the work of an old master as previously thought This has caused its value to drop from millions to almost nothing. Yet no art experts were able to deted that it was not the real thing'. This means that the value of a painting is determined by who painted it rather than any intrinsic artistic merit. Which of the following, if true, would most strengthen the above argument?A.
The works of some forgers of art now sell forvery large amounts of money.
B.
Many old masters changed their style during their career.
C.
In controlled tests, art experts have been shown to be very good at identifying the painters ofworks they have not seen before.
D.
Until its true origin was discovered, the painting in our museum was widely regarded as a masterpiece.
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A.
暑假刚开始，小明的家长便为他买好了下学期的语文、数学、外语教材及教辅材料，要求他严格按计划完成全部的预习任务
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某教育培训机构要求授课教师适当增加教学内容，加大学习难度，吸引更多的优秀学生前来参加各门各类课程的补习
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王女士儿子成绩一直很优秀，虽然才读小学三年级，家里就为他请了家教，每周两次一对一辅导法语学习
D.
在在全市中学生数学竞赛前夕，某校多次聘请大学教授占用其他课程的时间为参赛选手进行强化训练
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A.
方差
B.
净现值
C.
标准差
D.
标准离差率
【单选题】( )主要功能是当网民在网页上输入手机号码时,单击页面按钮,百度离线宝会自动向网民和企业拨打电话,双方接起即可通话。
A.
400增值
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媒体追踪
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网页回呼
D.
以上全错
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