【多选题】一般来说,PID控制器参数微分系数Td与控制效果有密切关系,如下哪些说法是准确的。
【单选题】以下不属于SpringerLink电子期刊数据库收录的有?
【单选题】听力原文:W: This is too much. I have been waiting for my meal for more than half an hour. M: I know, but you see the restaurant is full and we're shorthanded today. Q: How does the woman feel? (15)
【单选题】下哪种不属于我馆已采购的电子资源数据库?
A.
Cambridge Journals Online 剑桥学术期刊
【单选题】Miss Sullivan tried to make Helen understand that "mug" is mug and "water" is water, but Helen kept confusing them, then Sullivan _________.
A.
dropped the subject once and for all
B.
continued to do it until she realized that her repeated attempts made Helen tired and angry
C.
became impatient and unhappy and gave it up
D.
dropped it for a while and picked it up when there was an opportunity
【简答题】Tired and impatient, we had a fight.