单项选择题

According to the author, if your letter is thrown into some "letters-to-be-read" file,

A．it will receiver immediate attention
B．it will be dealt with by the secretary
C．it is likely to be neglected
D．it is meant to be delivered soon
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单项选择题
A myograph (Para. 2, Line 1) is an electronic instrument that __________.
A．is able to design new tools
B．measures the amount of energy used
C．enable people to see the muscular movements
D．visualizes electrical signals
单项选择题
Dr. Tichauer started his experiments initially to __________.
A．improve efficiency
B．increase production
C．reduce work load
D．improve comfort
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