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【单选题】
分光光度计测定蛋白质含量的依据是A.
蛋白质紫外吸收的最大波长280nm
B.
蛋白质是两性电解质
C.
蛋白质分子大小不同
D.
蛋白质多肽链中氨基酸是借肽键相连
E.
蛋白质溶液为亲水胶体
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皮皮学刷刷变学霸
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【简答题】客房部在酒店中的地位?
【单选题】All the crew _______ were killed in that heavy storm.
A.
board
B.
abroad
C.
on board
D.
on the board
【简答题】The president promised to keep all the board members ________ of how the negotiations were going on. A) informed B) inform C) be informed D) informing
【单选题】The board of the company has decided to ______ its operation to include all aspects of the clothing business.
A.
extend
B.
enlarge
C.
expand
D.
amplify
【单选题】The pilot asked all the passengers on board to remain ______ as the plane was making a landing.
A.
seat
B.
seating
C.
seated
D.
to be seating
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