问题
单项选择题
直角三角形中,某锐角的正切函数是()。
A、对边/斜边
B、邻边/斜边
C、对边/邻边
D、邻边/对边
答案
参考答案:C
直角三角形中,某锐角的正切函数是()。
A、对边/斜边
B、邻边/斜边
C、对边/邻边
D、邻边/对边
参考答案:C
根据句意从方框中选用合适的词语,并用其适当形式填空。 | |
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1. He _______ his bedroom. It's clean now. 2. The boy _______ seeing his mother now. He misses her very much. 3. They are interested in _______ on the Net, for it can make them know each other well. 4. I must _______. I'm meeting Brand at half past seven. 5. I write to my mother every week, _______ on Sundays. |