The teacher _______ is talking with Jane is strict _______ us. [ ]
A. who; in
B. that; about
C. which; with
D. who; with
答案:D
The teacher _______ is talking with Jane is strict _______ us. [ ]
A. who; in
B. that; about
C. which; with
D. who; with
答案:D
投影仪是我们常见的教学仪器,右下图是它的结构示意图,其中有四个光学元件,已标明A、B、C、D代号.
(1)请你选择其中两个光学元件填表,指明各自的光学名称和在投影仪中所起的作用.
代号 | 光学名称 | 作用 |
A | ||
B | ||
C | ||
D |