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【简答题】
有些事情我们事先能肯定它一定会发生，这些事情称为______事件，有些事情我们事先能肯定______，这些事件称为不可能事件．
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举一反三
【单选题】Most species of this plant thrive in ordinary well-drained garden soil and they are best planted 8 cm deep and 5 cm apart.
A.
develop well
B.
grow taller
C.
mature
D.
bear fruit
【单选题】❶In prehistoric times brachiopods were one of the most abundant and diverse forms of life on Earth: more than 30,000 species of this clamlike creature have been cataloged from fossil records. ❷Today b...
A.
rejecting an earlier explanation for the longevity of certain brachiopod species
B.
reevaluating the implications of uniformity among existing brachiopod species
C.
describing the varieties of environmental change to which brachiopods are vulnerable
D.
reconciling opposing explanations for brachiopods’ lack of evolutionary success
E.
elaborating the mechanisms responsible for the tendency among brachiopod species toward specialization
【单选题】Perhaps the most familiar plant movement belongs to one species of mimosa called the sensitive plant. Within seconds, it can lower its leaves and make its tiny leaflets close up like folding chairs. T...
A.
geographical distribution of plant and animal species
B.
location and purpose of the pulvini
C.
appearance of the mimosa
D.
process that causes movement in the mimosa
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