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【单选题】
The advantages of a partnership include the following exceptA.
unlimited liability, investment withdrawal difficulty, more capital.
B.
unlimited liability, tax advantages and combined managerial skills.
C.
disagreements among partners, investment withdrawal difficulty and limited liability.
D.
unlimited liability, limited capital and disagreements among partners.
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【简答题】DC-CIK细胞杀肿瘤机制是怎样的?
【单选题】You’ll also learn the methods of ______ in order to gain confidence through public speaking.
A.
how to conduct prepared and impromptu speeches
B.
how to sing an English song
C.
how to write a poem in English
D.
how to read newspapers in English
【单选题】纤毛细胞的换能机制是怎样的?()
A.
基底膜的震动刺激纤毛细胞,发生偏斜,能够使纤毛外环境内淋巴细胞钾离子流入细胞内,引起去极化,钙通道打开,进而又激发钙依赖加通道,钾离子流向外淋巴液引起复极化
B.
基底膜震动,纤毛发生偏转,纤毛外环境外淋巴液钾离子浓度低,通道打开钾离子流向外淋巴液
C.
基底膜震动,纤毛偏转,纤毛外环境是内淋巴液,通道打开,钾离子外流引起复极化
D.
基底膜震动使纤毛发生偏转,纤毛外环境内淋巴液钾离子浓度高,流入纤毛内,去极化是的钙离子通道打开,进而又使钙依赖钾通道打开,钾离子流向内淋巴液引起复极化
【简答题】视杆细胞的感光换能机制
【单选题】You’ll also learn the methods of ______ in order to gain confidence through public speaking.
A.
how to conduct prepared and impromptu speeches
B.
how to sing a song
C.
how to write a poem in English
D.
how to read newspapers in English
【单选题】纤毛细胞的换能机制是怎样的?()
A.
基底膜的震动刺激纤毛细胞，发生偏斜，能够使纤毛外环境内淋巴细胞钾离子流入纤毛内，引起去极化，钙通道打开，进而又激发钙依赖钾通道，钾离子流向外淋巴液，引起复极化
B.
基底膜震动，纤毛发生偏转，纤毛外环境外淋巴液钾离子浓度低，通道打开钾离子流向外淋巴液
C.
基底膜震动，纤毛发生偏转，纤毛外环境是内淋巴液，通道打开，钾离子外流引起复极化
D.
基底膜震动，纤毛发生偏转，纤毛外环境内淋巴液钾离子浓度高，流入纤毛内，去极化使得钙离子通道打开，进而又使钙依赖钾通道打开，钾离子流向内淋巴液引起复极化
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