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【多选题】
卤代烃与氢氧化钠在水与乙醇混合物中进行反应,下列反应情况中哪些属于SN1机制?A.
一级卤代烃反应速率小于三级卤代烃
B.
碱的浓度增加，反应速率无明显变化
C.
两步反应，第一决定反应速率的步骤
D.
增加溶剂的含水量，反应速率明显加快
E.
产物的构型80%消旋，20%转化
F.
进攻试剂亲核性越强，反应速率越快
G.
增加溶剂含醇量，反应速率加快
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皮皮学刷刷变学霸
举一反三
【单选题】.In an effort to maintain social balance, the Chinese government several years ago _______a policy of encouraging college graduates to take official positions in rural areas.
A.
adapted
B.
adjusted
C.
adopted
D.
admitted
【单选题】If the balance of payments accounts of a country shows a current account deficit, it means that:
A.
it is acting as a net lender to the rest of the worlD.
B.
its foreign assets are growing slower than its foreign liabilities.
C.
its foreign assets are growing faster than its foreign liabilities.
D.
its exports are higher than its imports.
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