问题
选择题
已知a﹣b=1，则代数式2a﹣2b﹣3的值是（ ）
A．﹣1
B．1
C．﹣5
D．5
答案
A
2a﹣2b﹣3=2（a﹣b）-3=2-3=-1.故选A
搜题请搜索小程序“爱下问搜题”
已知a﹣b=1，则代数式2a﹣2b﹣3的值是（ ）
A．﹣1
B．1
C．﹣5
D．5
A
2a﹣2b﹣3=2（a﹣b）-3=2-3=-1.故选A
| 完形填空。 | ||||
| In a small town in France, there was a farmer who lived alone. Every day he 1 a pound of butter to his neighbor, who was a baker, One day the baker decided to 2 the butter to see if he was getting a pound. After he weighed it, he found that he wasn't. The baker then took 3 farmer to the judge (法官). The judge asked the farmer if he had any way to weigh the butler. The farmer replied."I am so 4 that I do not have enough money to buy anything to weigh it, 5 I do have a kind of scale (天平)." The judge asked, "Then how do you weigh the buttery" The farmer replied,"Before the baker started buying butler from 6 , I had bought bread from him. So now every time when I bring home the bread from the baker, I put it On the scale and give him the butter of the same weight," We 7 what we give to Others in life. Whenever you take action, ask yourself this 8 , "Am I honest?" Honesty or dishonesty can become a 9 . Some dishonest people can lie (说谎) without a red face. Others lie so much that they do not even 10 what the truth is any more. But who is it bad for? As a matter of fact, those who lie will hurt themselves by their own dishonest | ||||
|