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【简答题】
A famous doctor once received a little child who was badly ill. Thanks to his skill and care, his young patient got well and was soon able to get up and run about again. The child’s mother was very much obliged to the doctor, and she called on him to thank him for what he had done for her child. “Doctor,” she said, “you have saved my little son. I don’t know how to thank you enough. I feel that money alone cannot repay you, so I have made this little purse with my own hands, as a sign of my gratitude. I hope you will accept it.” The doctor stood up and said coldly, “Madam, a little present like that is very nice between friends, but a doctor needs to be paid properly for what he has done.” The lady was so surprised and hurt so much that she could not reply for a moment. Then she said quietly, “Perhaps you will tell me how much your fee is?”“Fifty pounds”, he answered. The lady opened the little purse and took out four fifty-pound bank notes. She handed one of them to the doctor, and put the other three back into the purse. She put the purse into her handbag and, saying good bye to the doctor, went out of the room. 小题1:The doctor refused the lady’s purse because he thought ______. A.the purse should be given between friends B.the purse was too small C.the lady was not kind to him D.the lady just gave him that purse and wouldn’t give him the medical fee 小题2:What the doctor said ______ the lady. A.worried B.interested C.frightened D.hurt 小题3:The money in the purse _______. A.was only 150 pounds B.was less than 200 pounds C.was much more than the medical fee D.was not enough for the medical fee
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【简答题】log a 1 + ln e - 2 -2 =
【简答题】十进制数37.25 写成IEEE754短浮点数格式,其对应的16进制代码是________。(形如 0A1B2C)
【简答题】计算: 2 5 ?(lo g 4 7+lo g 2 49)? ln2 ln7 =______.
【单选题】已知f(x)= e x 1+ e x ,则 f -1 ( 1 3 ) =(  )
A.
log 1 2 e
B.
log 2 e
C.
e 1 3 1+ e 1 3
D.
-ln2
【简答题】计算log a 1 +ln e - log 2.5 6.25 + lg(1/100)
【简答题】十进制数37.25 写成IEEE754短浮点数格式,其对应的16进制代码是________。(形如 2A2B)
【简答题】计算:log 2.5 6.25+lg 1 100 +ln( e e )+log 2 (log 2 16)
【单选题】青霉素和头孢菌素的抗菌作用机理是
A.
抑制细菌细胞壁的合成,导致细菌细胞壁通透性增加
B.
损伤细菌细胞膜
C.
抑制细菌蛋白质的合成
D.
抑制细菌DNA的复制
【判断题】头孢菌素为真菌培养液提取物,属半合成抗生素,活性基团也是内酰胺环,与青霉素有相似的理化性质、生物活性、作用机制和临床应用。
A.
正确
B.
错误
【判断题】超音速气流在收缩管道中作加速运动。()
A.
正确
B.
错误
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