单项选择题

24()

A.as
B.like
C.of
D.against

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单项选择题
Papusek noticed in his studies that baby ()

A.would make learned responses when. it saw the milk
B.would carry out learned movements when it had enough to drink
C.would continue the simple movements without being given milk
D.would turn its head to right or left when it had enough to drink

单项选择题
Usually you will not get a shock by touching the electric ray in one place only because ()

A.the current in one place is not strong enough to give a shock
B.the fish’s electric cells are filled with jelly-like substance
C.to complete the circuit, you have to touch the fish in two places
D.a torpedo’s electric cells contain more than one electric plates

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