单项选择题

A．1.7 billion.
B．1.7 million.
C．30 billion.
D．30 million.
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单项选择题
A．She favored him with a glass of water.B．She ignored him and went to work.C．She called in the police.D．She poured water on him.
A．She favored him with a glass of water.
B．She ignored him and went to work.
C．She called in the police.
D．She poured water on him.
单项选择题
A．The universe is infinite and looks roughly like a soccer ball.B．The universe is finite and roughly resembles a soccer ball.C．The universe is infinite and is not stable at all.D．The universe is finite and is not stable at all.
A．The universe is infinite and looks roughly like a soccer ball.
B．The universe is finite and roughly resembles a soccer ball.
C．The universe is infinite and is not stable at all.
D．The universe is finite and is not stable at all.
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