问题
填空题
水准面是处处与铅垂线（）的连续封闭曲面。
答案
参考答案：垂直
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水准面是处处与铅垂线（）的连续封闭曲面。
参考答案：垂直
| 先阅读短文，掌握其大意。然后从方框中所给的词中选出恰当的10个，并用其适当形式填空， 每个此限用一次。 | |
when he was three. His grandfather 2 in bed for many years. His mother worked so 3 that she is ill now. She will not 4 money for her family. The family is in 5 . Yang Liang can't go to school 6 other students. When the local government knew the things, they took 10, 000 yuan 7 the family. They let Yang Liang keep his 8 . Yang Liang needn't 9 any money for school. When the famous ping-pong player Deng Yaping knew this, she 10 to help him finish his study until he graduated from the university. |