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问题 单项选择题

双缩脲试剂中不含

A．Cu2+

B．NaOH

C．酒石酸钾钠

D．碘化钾

E．Fe3+

答案

参考答案：E

解析：本题考查双缩脲试剂的成分，双缩脲试剂的成分包括硫酸铜、酒石酸钾钠、碘化钾、NaOH。

填空题

数据是企业中最 【18】 的因素，它又是企业所有运行活动的数字化特征：
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单项选择题

When most people refer to multimedia, they generally mean the combination of two or more continuous media, usually with some user (115) . In practice, the two media are normally audio and video, this is, (116) plus moving (117) .
It should be’ obvious by now that transmitting multimedia material in uncompressed form is completely out of (118) . The only hope is that massive compression is possible. Fortunately, a large body of research over the past few decades has led to many compression techniques and algorithms that make multimedia transmission (119) .

A．impossible

B．fearful

C．feasible

D．program

E．question

F．ting
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