【名词&注释】
染色体(chromosome)、细胞分裂(cell division)
[单选题]人们通常食用芹菜的( )。
A. 茎
B. 叶柄
C. 变态茎
D. 变态叶
查看答案&解析
举一反三：
[单选题]The author mentions Harlow’s experiment to show that ______.
A. adults should develop social skills
B. babies need warm physical contact
C. caregivers should be healthy adults
D. monkeys have social relationships
[单选题]We tried to find a table for seven，but they were all ．
A. givenawayB．keptaway
B. takenupD．usedup
[单选题]细胞分裂时，染色体数目减半发生在分裂后期。( )
A. 正确
B. 错误
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