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【单选题】
图示 74LS112 中 表示A.
低电平时置 0
B.
低电平时置 1
C.
平时置 1
D.
平时置0
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皮皮学刷刷变学霸
举一反三
【简答题】栀子生用具有 、 、 等功效;焦栀子具有的功效是 。
【单选题】Of the three sentences in each group, select the one that is NOT a sentence fragment.
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
【多选题】下列说法正确的是
A.
根据酸碱质子理论，溶剂既能给出质子，又能接受质子，是两性物质
B.
根据酸碱电子理论，提供电对的分子或离子是酸，接受电对的分子或离子是碱
C.
在二元弱酸溶液中，由于第一级解离产生的H+对第二级解离反应产生同离子效应，因此， K a1 Θ > K a2 Θ
D.
25℃时，离子酸NH 4 + 的解离常数 K b Θ (NH 4 + )= K w Θ / K b Θ (NH 3 + )
【简答题】She wouldn't forget her mother's birthday __________ she seldom wrote to her family.
【简答题】2018 年 1 月 A 生产企业(增值税一般纳税人)进口货物,海关审定的关税完税价格为 500 万元,关税税率为 10% ,海关代征了进口环节的增值税,取得海关进口增值税专用缴款书。进料加工复出口业务保税进口料件一批,到岸价格 400 万元,海关暂免征税予以放行,从国内市场购进原材料支付的价款为 1400 万元,取得增值税专用发票上注明的增值税为 238 万元。进料加工复出口货物的出口离岸价为 ...
【单选题】Which statement is Not a sentence fragment?
A.
Because Manuel was sure he had heard the same strange story many months ago.
B.
Although I will never forget how cold we were when we lost our heat last winter.
C.
Since Anna wasn't at the meeting, I took notes so that she wouldn't miss anything.
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