【简答题】Match the following words and expressions with their meanings. inspirational/assert/overthrow/rebel/nostalgic/invade/ take to/be associated with/ gender/petition 1 . the fact ofbeing either male or fe...
【简答题】If you say that someone m(__)people, you disapprove of them because they skilfully force or persuade people to do what they want. (11 letters)
【多选题】有关重结晶溶剂描述正确的是
A.
重结晶法精制最终产物时,只需除去由原辅材料和副反应带来的杂质
C.
在实际生产过程中,用非极性溶剂溶解时用混合溶剂作为重结晶溶剂
D.
选择重结晶溶剂时溶剂的沸点不宜高于被重结晶物质的熔点
E.
常用重结晶溶剂有:氯苯、甲苯、乙腈、乙醇、氯仿等
【单选题】According to the sentence in Paragraph 14“Parents always force children to do things, so it’ s hard for children to say that they haven’ t found someone and they are still looking,” what did a dating ...
A.
Whether their children will marry a rich person or not.
B.
Whoever their children will get married with doesn’ t matter much, compared to the result of getting married itself.
C.
Whether there is equal communication between the two who are getting married.
D.
Whether the parents force their children to accept their opinions or not?
【简答题】1 Match the following words and expressions with their meanings. inspirational/assert/overthrow/rebel/nostalgic/invade/ take to/be associated with/ gender/petition 1 . the fact ofbeing either male or ...
【单选题】oblige What is the meaning of oblige in sentence "She refuses, claiming that her professional standards oblige her to protect her sources."?
A.
to force someone to do something
B.
to respond to a request for help
【单选题】下列关重结晶的描述错误的是
A.
重结晶时对母液的浓度(固体溶质)没有严格要求
B.
理论上重结晶的温度区间可以在最低共熔点和沸点之间
C.
溶质的饱和溶解度随温度变化越大,重结晶的效率越高
【单选题】在重结晶溶剂的选择原则中,不正确的是( A )