皮皮学，免费搜题
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搜题
【单选题】
腹足纲的动物体呈螺旋状，（）不对称，头部发达，具有一对或两对触角，足位于身体腹面，一般呈块状，适于爬行，如蜗牛。A.
左右
B.
前后
C.
腹背
D.
头尾
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皮皮学刷刷变学霸
举一反三
【单选题】According to the passage we can conclude that further researches should be made _____________________.
A.
to help learning-disabled children to develop their intelligence
B.
to study children learn to read and write, and use numbers
C.
to investigate possible influences on brain development and organization
D.
to explore how the left side of the brain functions in language learning