单项选择题

The theme of this story is that______.

A．those using logic are not always logical
B．mysteries can always be solved by using logic
C．detectives can never be trusted
D．guilt can always be proved scientifically

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热门试题

单项选择题The writer implies that______.

A．the detective' s search took five days
B．the Gloritania was about to leave New York
C．the ship' s captain refused to cooperate
D．most New Yorkers are bald

单项选择题One benefit the author mentions is that the system______.

A．uses no electricity
B．has a fire-safety shutoff
C．does not pollute the air in the house
D．pollute the air in house