无脊椎动物的神经系统的发展
A. 网状神经、梯形神经、筒状神经、链索状神经、集中型链索状神经
B. 梯形神经、网状神经、筒状神经、链索状神经、集中型链索状神经
C. 网状神经、梯形神经、链索状神经、筒状神经、集中型链索状神经
D. 网状神经、筒状神经、梯形神经、链索状神经、集中型链索状神经
_______ water is to fish, so air is to man.
A. Though
B. Since
C. If
D. As
Theworkershave_______coffeebreakintheafternoon.
A. ten minutes
B. a ten-minute
C. a ten-minutes
D. ten minute
Hefellinlovewith_______girl.
A. a blue-eye
B. a blue eye
C. ablue-eyed
D. blue-eyed
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