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【判断题】
灌溉定额是指某一次灌水每亩田的灌水量。A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】外单位的施工作业人员进出车站须提前与车站行车值班员联系,最迟于关站前 ( )进站。车站查验《施工作业令》和相关证件后开门放行。
A.
30分钟
B.
20分钟
C.
15分钟
D.
10分钟
【单选题】Lysozyme is an important component of the human innate immune system. Lysozyme is an enzyme that cleaves glycosidic linkages in bacterial cell walls. The pH optimum of the purified enzyme is 5.2. Ther...
A.
E35 is protonated; D52 is ionized.
B.
E35 is protonated; D52 is protonated.
C.
E35 is ionized; D52 is protonated.
D.
E25 is ionized; D52 is ionized.
E.
This cannot be determined from the information provided.
【单选题】The substrate of lysozyme is ______________, a carbohydrate found in many bacterial cell walls. Lysozyme cleaves the (β1→4) glycosidic C–O bond between the two types of sugar residues in the molecule,...
A.
glycan
B.
peptidoglycan
C.
dipeptide
D.
glycoprotein
【单选题】Lysozyme produced by humans and other mammalian hosts ( )
A.
Inhibits the addition of amino acids to NAG.
B.
Cleaves peptidoglycan between N-acetyl-glucosamine(NAG) and N-acetyl-muramic acid (NAM) residues.
C.
Disrupts the outer membrane of gram negative bacteria.
D.
Destroys lipopolysaccharide.
E.
Results in a sterile environment in the mouth.
【简答题】下图中，正确的A向视图为（ ）。
相关题目：
【单选题】外单位的施工作业人员进出车站须提前与车站行车值班员联系,最迟于关站前 ( )进站。车站查验《施工作业令》和相关证件后开门放行。
A.
30分钟
B.
20分钟
C.
15分钟
D.
10分钟