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【单选题】
46%司盘60(HLB=4.7)和54%吐温80(HLB=15)组成的混合表面活性剂的HLB值为A.
19.7
B.
2.115
C.
10.26
D.
10.36
E.
10.31
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B.
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A.
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B.
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C.
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A.
在治疗量即有抑制呼吸作用
B.
对钝痛的效果不如其它镇痛药
C.
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A.
在治疗量即有呼吸抑制作用
B.
对钝痛的效果不如其它镇痛药
C.
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D.
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E.
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A.
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D.
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