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空格内填入一个适当的英语单词。所填单词要求意义准确，拼写正确。（10分）
| Dear editor, I am a high school student. I’d like to tell you something about 1．_ friend, Wu Gang. A few days ago, he told me that he was going to stop school. He said that he wanted to start his own business. I tried my 2． to get him to change his mind. However, I know it’s difficult 3． f him to change his mind. He studies hard, 4．b he doesn’t do well in his studies. Now he is tired of studying. He plays computer games day and 5． (晚上). I still think that he should finish his studies. The course is more important than the 6． . Now there are only 60 days 7．_ before the final examination. I’m not 8．_ (确定)whether I can persuade (说服) him to continue his studies. Could you 9．_ (给) me some advice? I really need your help. I’m 10．l_ forward to your reply. Best wishes! Sincerely, Yu Li |
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
