听力原文:M: I think we should move on to the next item. W: OK. But I'd like to take this matter up again at the end of the meeting. Q: What does the woman imply? (17)
A.
They should put the meeting to an end.
B.
They should hold another meeting to discuss the matter.
【简答题】Dinitrogen pentaoxide, N 2 O 5 , is the anhydride of nitric acid. It is not very stable, and in the gas phase or in solution with a nonaqueous solvent it decomposes by a first-order reaction into N 2 ...
【简答题】It is difficult to prepare many compounds directly from the elements,so values for these compounds cannot be measured directIy. For many organic compounds,it is easier to measure the standard enthalpy...