单项选择题

"At sea, ships within sight of each other but out of earshot" The underlined word means______.

A．the ear was shot
B．a man' s
C．can't hear
D．hearing distance
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单项选择题
The passage mainly tells us ________.
A．how to send messages
B．what the Morse code is and how it is widely used
C．the Morse code is used telegraphic code
D．how Morse invented the telegraphic code
单项选择题
From the passage we can infer _________.
A．Marianne Adam has had many photographs printed in magazines
B．Joseph Saimders has worked in New Urban ,University for over 12 years
C．Dr John Goode's method of stopping smoking is successful
D．many business education teachers have given successful lessons in typing before
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