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病人经过两年综合治疗，到医院复查，医生想了解病人近一段时间血糖控制情况，建议他抽血检查糖化血红蛋白。请问糖化血红蛋白可以反映多长时间血糖控制情况（）
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Museums have changed. They are no longer places that .one should "go but enjoy".
At a science museum in Canada, you can feel your hair stand on end as harmless electricity passes through your body. At the Children's Museum in New York, you can play an African drum(E). There are no "Don't Touch signs in some other museums in the USA.
More and more museum directors have realized that people learn best when they can become part of what they are seeing. In many science museums, the visitors are encouraged to touch, listen, operate and experiment so as to discover scientific rules for themselves. The purpose is not only to provide fun, but also help people feel at home in the world of science.
One cause of all these changes is the increase in wealth and spare time. Another cause is the growing number of young people in the population. Many of them are college students or college graduates. They see things in a new and different way. They want art that they can take part in. The same is true about science and history.
The old museums have been changing and the government is encouraging the building of new modern museums. In the United States and Canada, there are more than 6,000 museums, almost twice as many as there were 25 years ago.
The directors of the museums have realized ______.
骨肉瘤的X线片改变（）
熟地、白芍主治
A8mm
B至少6mm
C4～6mm
D3～4mm
E15～2mm
舌杆离开龈缘应
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