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【单选题】
青霉素引起的过敏性休克,抢救首选A.
去甲肾上腺素
B.
多巴胺
C.
肾上腺素
D.
肾上腺素
E.
糖皮质激素
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皮皮学刷刷变学霸
举一反三
【单选题】—Do you often see him____soccer in the field? —Yes. Look! You can see him ____ there now. [ ]
A.
play; play
B.
playing; playing
C.
play; playing
D.
playing; play
【单选题】—Have you persuaded him? —Yes .After some hours ofdiscussion, I toreason him in accepting the new plan.
A.
had managed
B.
would manage
C.
havemanaged
D.
managed
【多选题】关于蛋白质的说法正确的是【 】
A.
蛋白质是细胞和生物体重要组成部分,占细胞干重一半。肌肉、皮肤、血液和毛发主要成分都是蛋白质,生物膜中蛋白质含量约占60%-70%
B.
植物体内由于有丰富纤维素,蛋白质含量相对较少
C.
蛋白质主要组成成分是氨基酸。A-腺嘌呤,U-尿嘧啶,C-胞嘧啶,G-鸟嘌呤四种碱基中每三种碱基构成一种氨基酸。氨基酸主要成分有碳氢氧氮四种元素重量合占99%,此外有铁硫镁等微量元素。不同种类不同数量氨基酸按不同排列方式构成不同蛋白质。有些蛋白质完全由氨基酸组成称为简单蛋白质(核糖核酸酶、胰岛素);有些蛋白质除蛋白质部分外还有非蛋白质成分称为结合蛋白质(血红蛋白、核蛋白)
D.
蛋白质分子是由众多氨基酸通过肽键连接起来的多肽键。蛋白质一级结构是指蛋白质中氨基酸排列顺序。蛋白质结构与蛋白质活性密切相关。蛋白质可以结晶也容易变性。蛋白质的空间结构改变其活性也将随之变化
【单选题】--- Did you return the book you borrowed from Tom? --- Yes, I gave it to him ______ I saw him.
A.
for the moment
B.
the moment
C.
for a moment
D.
at the moment
【单选题】— Have you persuaded him? — Yes.After some hours of discussion, I ________ to reason (说服) him into accepting the new plan. [ ]
A.
had managed
B.
would manage
C.
manage
D.
managed
【简答题】—Have you persuaded him? —Yes .After some hours of discussion, I to reason him in accepting the new plan. A ． had managed B ． would manage C ． have managed D ． managed
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