【简答题】巴比妥类药物结构中含有()结构。与碱溶液共沸而水解产生(),可使红色石蕊试纸变()。
【单选题】I have made _______ clear _______ I have nothing to do with the accident.
【单选题】-Is this factory ______ we will have a short stay? -Yes, it is in this factory ______ we will have a big party. [ ]
【单选题】The first place _______ in the factory was the tool room.
【判断题】E-Lear错误i错误g可以取代面授学习。( )
【单选题】If there is a shortage of factory laborers, we would expect
A.
the wages of factory laborers to increase.
B.
the wages of factory laborers to decrease.
C.
the prices of factory commodities to decrease.
D.
a decrease in the demand for substitutes of what this factory produce.
【单选题】---- What about going swimming this afternoon , Tom? ---- ____. I have a test tomorrow, so I have to go over my lessons today.
【简答题】巴比妥类药物分子结构中含有丙二酰脲基团,其特性反应为