单项选择题

The significance of the slow speed of tsunamis is that people may ______.
A) notice them out at sea C) be warned early enough
B) find ways to prevent them D) develop warning systems

A．The significance of the slow speed of tsunamis is that people may ______.
B．notice them out at sea
C．find ways to prevent them
D．be warned early enough
E．develop warning systems
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单项选择题
Which of the following CANNOT be concluded from the passage
A．The number of earthquakes is closely related to depth.
B．Roughly the number of earthquakes varies much every year.
C．Earthquakes are most likely to occur within the upper 15 miles of the earth's surface.
D．Earthquakes are most likely to occur near the surfaces.
单项选择题
What can we infer from the last sentence of this passage
A．There is no difference between science fiction and any other story or novel.
B．Reader should enjoy science fiction and any other story or novel together.
C．Science fiction and any other story or novels are equal to each other.
D．If a person can appreciate prose fiction, she or he can appreciate science fiction as well.
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