英版海图某灯塔灯高81m，额定光力射程24M，已知测者眼高为9m，则_爱下问搜题

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问题单项选择题

英版海图某灯塔灯高81m，额定光力射程24M，已知测者眼高为9m，则能见度良好（10nmile）时该灯塔灯光的最大可见距离是（）。

A．26.4nmile

B．25.0nmile

C．24.0nmile

D．23.5nmile

答案

参考答案：C

补全对话，情景问答

补全对话。

A. She is an outstanding ping-pong player.
B. He's really outstanding
C. What other athletes do you admire?
D. I don't like baseball.
E. Who is Babe Ruth

A: Do you have a favorite athlete, John?
B: Yes, Laura. I admire Wang Nan.     1
A:      2
B: I admire Michael Jordan. He plays
basketball.
A: I know that, John. I've watched Jordan.
         3    . But I admire Babe Ruth.
B:      4    ?
A: He was a famous baseball player, Ruth.
B: A baseball player?     5     So I don't know about him.

多项选择题

界定概念就是给概念下定义，下定义一般包括（）。

A.质性定义

B.内涵定义

C.外延定义

D.操作性定义