问题
选择题
若关于x的方程4x－m＋2＝3x－l的解为正数，则m的取值范围是
A．m>－1
B．m>－3
C．m>3
D．m<3
答案
D.
题目分析：移项，得：4x-3x=m-3，
即x=3-m，
根据题意得：3-m＞0，
解得：m＜3．
故选D.
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若关于x的方程4x－m＋2＝3x－l的解为正数，则m的取值范围是
A．m>－1
B．m>－3
C．m>3
D．m<3
D.
题目分析：移项，得：4x-3x=m-3，
即x=3-m，
根据题意得：3-m＞0，
解得：m＜3．
故选D.
| 阅读理解。 | |
| |
| 1. Which shows New York P&H (PLUMBING & HEATING) has been in business for a long time? | |
| A. "Since 1968". B. "24 Hours 7 Days Service". C. "56568822". D. "268 Pine Street 5th Avenue". | |
| 2. For which of the following problems would one call New York P&H? | |
| A. Rainwater drops from the roof. B. A refrigerator stops working. C. The floor of the bathroom is covered with water. D. There's something wrong with the furniture. | |
| 3. What will the person who needs help probably discuss with New York P&H? | |
| A. Duties. B. Tools. C. Meals. D. Costs. | |
| 4. If something is wrong with your heating, ______. | |
| A. you can ask them for help at once B. New York P&H has known it clearly C. P&H will just help you by telephone D. you can ask for free fixing in 24 hours | |
| 5. Which of the following is NOT clear in the reading? | |
| A. Where P&H is. B. How big P&H is. C. What P&H does. D. When P&H was set up. |