【名词&注释】
氨基酸(amino acid)、核苷酸(nucleotide)、不存在(there is no)、脱氧核糖(deoxyribose)、双子叶植物(dicotyledon)、报春花属(primula)、推理判断题、中柱鞘(pericycle)、中果皮(mesocarp)
[单选题]的特征是叶全基生，花葶顶生伞形或复伞形花序。
A. 报春花属
B. 点地梅属
C. 珍珠菜属
D. A和B
查看答案&解析
举一反三：
[单选题]The underlined word “rainbow” in the last paragraph refers to ______.
A. the rainbow in the sky
B. the stripes on the pavement
C. something imaginative and fun
D. important lessons learned in childhood
[单选题]果皮的作用是( )。
A. 保护种子，为种子萌发提供有机养料
B. 保护种子，协助种子传播
C. 协助种子传播，为种子萌发提供有机养料
[单选题]
A. As
B. Because
C. Until
D. So
[单选题]（1）1分题（共8题）1.下列有机化合物中，只含有C、H、O三种元素的是
A. 氨基酸
核苷酸
脱氧核糖
磷脂
[单选题]银杏的中果皮(mesocarp)骨质。( )
A. 正确
B. 错误
[单选题]在双子叶植物根和茎初生结构中均有中柱鞘(pericycle)存在。( )
A. 正确
B. 错误
[单选题]My parents don’t mind what job I do _________ I am happy.
A. even though
B. as soon as
C. as long as
D. as though
[单选题]What would Hilary expect most from modern life in the three months? [ ]
A. To play computer games
B. To make phone calls
C. To listen to music
D. To chat on the Internet
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