【名词&注释】
破伤风类毒素(tetanus toxoid)、细胞壁(cell wall)
[单选题]绿藻门植物的游动孢子有鞭毛和细胞壁，而静孢子则无鞭毛和细胞壁。( )
A. 正确
B. 错误
查看答案&解析
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举一反三：
[单选题]请听第9段材料，回答15至17题。第15题：Why does the woman come to the man?
A. To greet him
B. To ask for information
C. To talk about the neighbors
[单选题]破伤风类毒素微囊是利用微囊的什么特点（ ）。
A. 降低毒性
B. 提高稳定性
C. 减少活性损失或变性
D. 提高利用度
E. 降低水解性
[单选题]_____ by the advances in technology, many farmers have set up wind farms on their land.
A. Being encouraged B． Encouraging
B. Encouraged D． Having encouraged
[单选题]I walked slowly through the market, where people all kinds of fruits and vegetables.I studied the prices carefully and bought what I needed.
A. sell
B. were selling
C. had sold
D. have sold
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