题目内容

（）命令可以手工释放DHCP 客户端的IP地址

A. ipconfig
B. ipconfig/rewiew
C. ipconfig/all
D. ipconfig/release

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They kept on trying their best to develop their business, but in such _____market competition, they had no idea if success would come along one day.

A. intense
B. subsequent
C. distinct

This rule should be entirely clear in the minds of everyone and should not be misunderstood under any ______.

A. circumstances
B. advocates
C. fulfillments

与紫外可见分光光度法相比，荧光分析法的优点是（）

A. 应用范围广
B. 灵敏度高
C. 更准确
D. 更稳定

以下说法错误的是（）

A. 分子结构中不饱和键的共轭程度越高，荧光效率越大
B. 共轭体系中的取代基团的种类对荧光效率没有影响
C. 刚性平面结构的分子具有较高的荧光效率
D. 随温度升高，荧光效率一般减小