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【单选题】
地西泮A.
取供试品适量，加硫酸溶解后，在365nm的紫外光下显黄绿色荧光
B.
取供试品适量，加水溶解后，加溴化氰试液和苯胺溶液，渐显黄色
C.
取供试品，加香草醛试液，生成黄色结晶，结晶的熔点为228~ 231℃
D.
取供试品5mg，加盐酸和1ml，加热至80℃，加过氧化氢数滴，即被氧化产生深红色
E.
取供试品0.lg，加水与0.4%氢氧化钠溶液各3ml，加硫酸铜试液1滴，生成黄绿色沉淀，放置后变为紫色 以下药物的鉴别反应是
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【单选题】Jones wants to cash in his winning lottery ticket. He can either receive five, $5,000 annual payments starting today, or he can receive a lump-sum payment now based on a 3% annual interest rate. What ...
A.
$23,586.
B.
$22,899.
C.
$21,565.
D.
$23,000.
【简答题】是否销售不好的、排在销售排行榜后三名的商品都应该淘汰?
【简答题】补全对话。 A. That would be great. B. What are you doing here? C. Are you going to the same Wushu class? D. Yes, thanks. E. Do you like Wushu? Mr. Huo: Hi, Tony. 1. Do you need any help? Tony: 2. I am look...
【简答题】在某养鱼塘中,根据过去经验,鱼的长度的中位数为 14.6cm ,现对鱼塘中鱼的长度进行一次估测,随机地从鱼塘中取出 10 条鱼长度如下 : 13.32 13.06 14.02 11.86 13.58 13.77 13.51 14.42 14.44 15.43 将它们作为一个样本进行检验 . 试分析,该鱼塘中鱼的长度是在中位数之上,还是在中位数之下 ....
【单选题】You decide to begin saving toward the purchase of a new car in five years. What would be the ending amount if $500 payments were made at the end of each 6-month period for 5 years and the account paid...
A.
$6,691.13
B.
$5,637.09
C.
$1,338.23
D.
$5,975.32
E.
$5,731.94
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