皮皮学，免费搜题
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搜题
【单选题】
静脉输血引起过敏反应的症状是A.
气促 咳嗽、咳粉红色泡沫性痰
B.
手足抽搐心率缓慢血压下降
C.
皮肤瘙痒，荨麻疹，眼睑水肿
D.
寒战高热头部胀痛
E.
腰背痛少尿
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【单选题】According to the passage, the author likes being with those______.
A.
fat people who are clumsy and slow in movement and gets fed up with those quick and sensitive thin people
B.
thin people who are always energetic and active and those fat people, too, who are steady in the moves they take
C.
fat people who are inactive and easily get jaded but hates to be among those thin people who are active and energetic
D.
thin people who get rid of things quickly but feels sick of those fat people who are all thumbs
【简答题】计算Cu 2+ 浓度为0.010mol·L -1 的溶液，(1)Cu(OH) 2 开始沉淀时的pH；(2)Cu 2+ 沉淀完全，即c(Cu 2+ )≤10 -5 mol·L -1 时溶液的pH。
【简答题】pH=10.0的NH 3 -NH 4 Cl缓冲溶液中，游离NH 3 的浓度为0.10mol·L -1 。若同时含有浓度皆为0.010mol·L -1 的Ag + 和Zn 2+ ，以同浓度的EDTA滴定Zn 2+ ，Ag + 有无干扰?(lgK ZnY =16.50，lgK AgY =7.32；pH=10.0时，lgα Y(H) =0.45；Zn 2+ 与NH 3 络合的lgβ 1 ～lgβ 4 分...
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