问题
单项选择题
（）是钻石的色散值。
A.0.043
B.0.044
C.0.045
D.0.046
答案
参考答案：B
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（）是钻石的色散值。
A.0.043
B.0.044
C.0.045
D.0.046
参考答案：B
It was late in the afternoon. Several hundred villagers left their houses and gathered in the open air outside the village. They were staring __ __ at the mountain top in the distance. It was covered with __ __ —beautiful and dangerous. The huge mountain is called Matterhorn. Mountain climbers had __ __ the top, using the southern route. But no one had __ __ dared to try a winter climbing up the northern side. But now one man was daring to try the __ __ route— the northern route, which was more difficult. He was Walter Bonatti, a great mountain climber from Italy. For two days he had climbed. The village people had watched him __ __. Now they were waiting to see his ____. If he planned to __ __ the next day, he would light a green signal. A red light would mean that he was __ __. A tiny green light __ __ high on the mountain side. Bonatti was not giving up! The people __ __. The next day he continued his way upward. He was so lonely and so __ __！But he would not give up. Again that night he lit the __ __ light. In the morning, Bonatti __ __. He could not see the top, but he knew he was __ __ there. Though the climb was painful, he moved up. Bonatti had spent months __ __ for the climb. Was the training enough? Did he have the strength and ____ to climb to the top? He was finally at the top! News about his __ __ was radioed to the world. The trip __ __ the southern route was easy. He was warmly welcomed in the village. He had done the “ __ __ ”，and would be well remembered as a climber of all time.
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