铬黑T指示剂在pH=7~11范围使用,其目的是减少干扰离子的影响。 ( )
参考答案:错
第二节 根据中文,完成句子(每空0.5分,共10分)
86.只有持续锻炼一个月后你才能完全康复。
Only after you keep on practising for a month_____ _______completely recover.
87.这幅漂亮的图画吸引了我的注意力。
The beautiful picture _________ ________ _________.
88.我们提前完成了任务,希望得到领导的表扬。
We finished the task ahead of time, ________ ________ ________ _______being praised by the leader.
89.我们到达了一个看起来像超市的地方。
We reached _______ ________ _______ a super market.
90.他母亲死于车祸,使得他的家境更加艰难。
His mother died in a traffic accident , ________ the family even _________ ________.
91.他因谋杀被处死。
He was _______ ________ ________for murder.
92.他花了30 年才建立自己的公司。
He spent 30 years _________ ________ his own company.
正常生产中,以下()种情况可以判断为减压炉进料中断。
A.减压塔液面下降
B.减压炉各路进料为零
C.常压侧线出黑油
D.减压炉出口温度及各分支温度升高