题型：选择题 等差数列{an}的公差d＜0，且a2•a4=12，a2+a4=8，则数列{an}的通项公式是（ ）A．an=2n-2（n∈N*）B．an=2n+4（n∈N*）C．an=-2n+12（n∈N*）D．an=-2n+10（n∈N*） 查看答案
题型：补全对话，情景问答 从方框中选择适当的选项补全对话,其中有一项是多余的。A: Look! Wang Tao! Who is that boy? B: Oh, he is my friend. A: 1 B: He comes from Fuzhou. A: Does he have short black hair? B: Yes, 2 He's tall and his clothes are nice. A: Is he Chen Ming? B: Yes, 3 And he is cool. A: 4 are these pants Chen Ming's? B: No, they aren't. They're mine. A: 5 B: I think they are green. A. Where does he come from? B. he does. C. Whose are these? D. you're right. E. Excuse me, F. What color are his pants? 查看答案
