能引起虹膜异色的是（） A.纯铜异物 B.铜合金异物（铜含量为80％） C.铁异物

小题1:A: A computer is on the teacher’s desk.

B: ________ ________ a computer on the teacher’s desk.

小题2: A: We play basketball on Wednesday, Friday and Saturday.

B: We play basketball ________ ________ a week.

小题3:A: Shall we go to see a film together?

B: ________ ________ go to see a film together?

小题4:A: Kate went to bed after she finished her homework.

B: Kate ________ go to bed ________ she finished her homework.

小题5:A: Whose China Today is this?

B: Who(m) ________ this China Today ________ to?

小题6:A: Could you tell me how I can get to the nearest supermarket?

B: Could you tell me ________ ________ to the nearest supermarket?

随着我国民主政治建设的不断发展，听证制度越来越受到人们的关注。对听证会的正确理解是：

①听证会上，公民作为决策的参与者可以充分发表意见、提出建议，以完善决策方案

②听证会有利于集中学者的智慧，提高决策的科学性

③听证于民的目的，就是为了决策利民

④有利于提高决策的透明度

A．③

B．①③

C．①③④

D．①②③④

目前已知促发原发性肝癌的两种肝炎疖毒是（）

A.甲型和乙型

B.甲型和丙型

C.乙型和丙型

D.乙型和丁型

E.丁型和戊型

五倍子是五倍子蚜危害（）后形成的虫瘿。

A.桃树

B.盐肤木

C.松树

D.柳树