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【单选题】
下列哪些个因素不妨碍蛋白质形成α-螺旋结构?A.
脯氨酸的存在
B.
连续出现多个色氨酸
C.
多聚赖氨酸
D.
连续3个丙氨酸
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】用来滤除混在液压油中的各种杂质,使进入液压系统的油液保持一定的清洁度,从而保证液压元件和液压系统安全可靠地工作的元件是
A.
过滤器
B.
油箱
C.
密封件
D.
管接头
【简答题】压力疗法的注意事项?
【简答题】使用压力疗法治疗瘢痕的原则及注意事项是?
【多选题】Which of the following sentences are appropriate with the word “monopoly”?
A.
Because the state tried to enforce a monopoly on ideas, intellectuals were both at great risk and terrifically influential.
B.
It was not easy to persuade the monarchy to let go of its monopoly of power.
C.
It is poor families who are usually stuck with the worst consequences of school monopoly and bureaucratization.
D.
Tax concessions for new companies and the end of the state monopoly on import-export trade were also announced.
【单选题】One difference between a monopoly and a competitive firm is that
A.
a monopoly is a price taker.
B.
a monopoly faces a downward sloping demand curve.
C.
a monopoly maximizes profit by setting marginal revenue equal to marginal cost.
D.
None of the above.
【单选题】What is the main idea of the passage?
A.
Let's play monopoly.
B.
The NCAA is the best monopoly.
C.
The U.S. Postal Service is the best monopoly.
D.
Competing to be the best monopolist.
【简答题】适用于配置标准中等的场合综合布线系统的等级是( )。 A)基本型 B)增强型 C)综合型 D)中等型
【单选题】以下关于基本型综合布线系统类型的描述中，哪个是错误的?——
A.
用铜芯双绞线电缆组网
B.
每个工作区有一个信息插座
C.
基本型适用于综合布线系统中等配置标准的场合
D.
每个工作区的干线电缆至少有1对双绞线
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