According to the passage, before taking a job, a person should ______.
A. demonstrate his capability
B. give his boss a good impression
C. ask for as much money as he can
D. ask for the salary he hopes to get
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To be successful in negotiations, one must ______.
A. meet his boss at the appropriate time
B. arrive at the negotiation table punctually
C. be good at influencing the outcome of the interaction
D. be familiar with what the boss likes and dislikes
NaHC03溶液
A. 5-OH黄酮
B. 3-OH黄酮
C. 7，4＇-20H黄酮
D. 7或4＇-OH黄酮
E. 7-OCH3-黄酮以下碱溶液可溶解的黄酮为
用紫外线灯消毒空气，下述哪项错误 ( )。
A. 灯管用无水乙醇纱布擦净
B. 消毒过程用纱布遮盖病人双眼
C. 灯亮5min开始计时
D. 关灯后须冷却3～4min再开
E. 使用超过2000h的灯管应更换
隧道施工方法中，( )的基本原则是“少扰动、早喷锚、勤量测、紧封闭”。
A. 新奥法
B. 盾构法
C. 明挖法
D. 盖挖法
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