问题
选择题
在代数式x2+5，-1，x2-3x+2，π，
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答案
和x2+5 x
分母中含有未知数，则不是整式，其余的都是整式．故应选B1 x+1
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在代数式x2+5，-1，x2-3x+2，π，
|
和x2+5 x
分母中含有未知数，则不是整式，其余的都是整式．故应选B1 x+1
| 从方框中选出适当的句子补全对话，其中有两项是多余的。 | |
| A: What's wrong, Jim? You look unhappy. B: I'm not. I feel a little worried about my English. A: 1 B: I'm not getting along well with it. A: 2 B: Well, I seldom have chances to meet English people. A: 3 B: Where should I go? A: 4 B: But... it seems English people never speak to me. A: Ah! You should speak first. B: 5 A: The weather! English people are always interested in weather.
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