单项选择题

The main idea of the first paragraph is ______.

A．life on land probably began about 430 years ago
B．the first animal on land came from oceans
C．there wouldn't be animals without plants
D．plants are the only form of life that is able to get and store energy

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热门试题

单项选择题

An important factor in a game of imperfect information is ______.

A．rules
B．luck
C．time
D．ideas

单项选择题

The subject discussed in this text is ______.

A．the process of reaching decisions
B．the difference between poker and chess
C．the secret of making good business plans
D．the value of information in winning games