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【判断题】
在某一群体中表现多态性的基因,在其他群体中不一定具有多态性。A.
正确
B.
错误
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【简答题】中国特色社会主义是党和人民胜利前进的光辉旗帜,是 的必由之路。
【单选题】An adult giraffe's head is about six feet above its heart. This means that to pump enough blood up to the brain the circulatory system must be strong enough to keep the blood at very high pressure. Bi...
A.
their legs and feet have strong skin and muscles
B.
their blood vessels are stiff and tough legs
C.
they wear a kind of special suit
D.
there are lots of one-way valves in the veins of their legs
【单选题】The giraffe____its very long neck.
A.
is characteristic by
B.
is characterized by \
C.
characterizes by
D.
characteristic with
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【简答题】Bringing a giraffe into the world is a tall order . A baby giraffe is born 10 feet high and usually lands on its back. Within seconds it rolls over its legs under its body. Then the mother giraffe rud...
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