【名词&注释】
生活史(life history)、孢子体(sporophyte)、世代交替(metagenesis)
[单选题]下列藻类生活史中，孢子体占优势的异型世代交替是( )。
A. 水云
B. 多管藻
C. 海带
D. 石莼
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举一反三：
[单选题]In the girl’s long painstaking training process, _____.
A. her adviser forms a primary challenging force to her success
B. her writing turns into an automatic pattern of performance
C. she acquires the magic of some great achievements
D. she comes to realize she is “hard-wired” to write
[单选题]专性寄生只能寄生不能腐生，兼性寄生是以寄生为主以腐生为辅。( )
A. 正确
B. 错误
[单选题]子叶出土的幼苗是种子萌发时由于( )的结果。
A. 上胚轴伸长
B. 胚芽伸长
C. 胚轴不伸长
D. 下胚轴伸长
[单选题]轮藻生活史中具原丝体阶段，在生活史中具有世代交替。( )
A. 正确
B. 错误
[单选题]
A. afford
B. offer
C. keep
D. like
[单选题]We can learn from the last paragraph that McKay .
A. preferred fight to his study
B. went to war before graduation
C. left a picture for Corey Everrett
D. set an example for his fellow students
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