精馏塔的操作和塔效率的测定:如果操作时,直接开始部分回流,会有何后果?
参考答案:
塔顶产品不合格。
根据首字母或汉语提示完成句子。
小题1:There are many p_______________ on the bus. It’s very crowded.
小题2:She feels l__________ because she has no friends to talk with.
小题3:The problem is very difficult. It seems i___________ for him to work it out.
小题4:Lily is very sad because she f__________ the math exam yesterday.
小题5:I i_________ Xiao Ming to my birthday party last Sunday.
小题6:Yesterday he _________ _________ ( 收到…来信 ) Michael. Michael said he would come to Beijing soon.
小题7:The headmaster called on the students to _________ __________(筹钱) for the poor boy.
小题8:I’d like to book a _____________ (标准) room with two single beds.
小题9:The teacher was able to ________ _________(使振作起来)the class by teaching them to sing lively songs.
新中国诞生前后,中国人民解放军进一步发展壮大,其标志是[ ]
A.组建了中国人民解放军导弹部队
B.成立了中国人民解放军海军和空军
C.爆炸了第一颗原子弹和氢弹
D.发射了“长征一号”运载火箭