问题
填空题
已知x=5是方程ax﹣8=20+a的解，则a=（ ）
答案
7
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已知x=5是方程ax﹣8=20+a的解，则a=（ ）
7
| 用方框中所给单词的适当形式填空。 | |
2. Forests can _______ the water from washing the earth away. 3. I asked Mrs. Wang if she would help. She agreed and _______. 4. Qian Xuesen is one of the most _______ scientists in the world. 5. The more _______ you describe it, the more easily we can understand. |