【简答题】In the conference, the mayor____________(反复强调了) the importance of environmental protection.
【单选题】以下实验原理或操作中,正确的是 [ ]
B.
装置②既可用于乙醇制乙烯的发生装置,又可用于分离沸点相差较大的互溶液体混合物
C.
室温下,含有CoCl 2 的干燥变色硅胶呈蓝色,在潮湿的空气中变粉红色,放在干燥的空气中又恢复为蓝色
D.
纸层析法分离铁离子和铜离子实验中,展开剂的成份为蒸馏水与丙酮
【单选题】If cauliflowers are not ______ from extreme temperatures, the heads get discolored.
【单选题】A Filipino maid was executed in Singapore after being convicted ______murder,despite protests from various quarters that her guilt had not been adequately established.
【简答题】The most disgraceful aspect of the tragedy was the selfishness of some passengers in protecting themselves and ______ the rest.
【简答题】A word that means “an enzyme that digests protein” with the root prote/o is .
【多选题】流化沸腾制粒法( )
B.
是通过热气流将固体粉末悬浮流化后,再喷入黏合剂或润湿剂溶液,使粉末黏合成颗粒的方法
C.
是将沸腾混合、喷雾制粒和气流干燥等工序合并在一台设备中完成的制粒方法
【多选题】含干浸膏的中药固体制剂的防湿措施,可选用的有
C.
采用水醇法除去水溶性胶质、粘液质、蛋白质等杂质
【判断题】气体钢瓶在使用时,将钢瓶内气体全部用尽后,应再重新灌装新的同种气体。
【单选题】交流励磁接触器吸合后电流与吸合前的电流之比( )。