问题
单项选择题
电气石的光性方向是（）。
A、Ne∥Z轴
B、No∥Z轴
C、Ne∥Y轴
D、No∥Y轴
答案
参考答案：A
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电气石的光性方向是（）。
A、Ne∥Z轴
B、No∥Z轴
C、Ne∥Y轴
D、No∥Y轴
参考答案：A
With a determined(坚定的) look on his face, Chicago’s Michael McCarthy held on to the banister(扶手) and climbed to the top of the Willis Tower not long ago. The Tower stands 1,451 feet(442 meters) tall, the＿21＿ building in the US. As he got to the last step, McCarthy ＿22＿ fell down, but that didn’t stop him. The 14-year-old boy finally finished climbing the 2,109 steps and arrived at the top, where he ＿23＿cheers from many people. “I just want to show people that ＿24＿ a kid with no legs can do it, anyone can do it,” McCarthy said. McCarthy, who was born without legs, has to wear prosthetic legs(假肢) and use a stick to walk. But McCarthy has a strong 25 . He believes having a disability(残疾) shouldn’t stop anyone 26 achieving his or her success. He has been in a special school 27 he was four. When he decided to climb the Willis Tower, his teacher, Jeff Kohn, was 28 by his determination(决心) and offered to help train him. They 29 more than ten hours practicing climbing stairs and keeping balance with the prosthetics and sticks on the steps every day. “ 30 seems that he never knows how difficult it is. 31 I was so tired that I asked him to rest for a day,”said Kohn. “But he said he was still full of energy and wanted more 32 .” Kohn always walked with McCarthy for the climb. “I 33 the last 10 floors, he went faster,” said Kohn. “He’s the most craven sportsman I’ve ever trained.” McCarthy said he was 34 of himself and that the tower now holds special meaning. “When I’m older, I’ll 35 to the building and say ‘Look at this building I climbed’,” he said.
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