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【单选题】

“请允许我借此机会,对弗莱彻先生及ABC集团公司对我们的盛情邀请、精心安排以及无与伦比的款待表示衷心的感谢”的正确译法是______

A.
Please allow me to avail this opportunity to express our thanks to Mr. Fletcher and the ABC Group for their enthusiastic invitation, extraordinary arrangement, and incomparable hospitality.
B.
Please allow me to avail this opportunity to express our thanks to Mr. Fletcher and the ABC Group for their kind invitation, considerate arrangement, and gracious hospitality
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刷刷题刷刷变学霸
举一反三

【单选题】用NA表示阿伏加德罗常数的值.下列叙述正确的是(  )

A.
在2升2mol/L的(NH4)2SO4溶液中所含的NH4+的数目是8NA
B.
常温常压下,2molCaC2晶体中含有的阴离子数为2NA
C.
14gN2和CO的混合气体含有的分子数目为0.5NA
D.
标准状况下,11.2L庚烷完全燃烧后生成的CO2分子数为3.5NA