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玻璃钢可由酚醛树脂和玻璃纤维制成。 （1）酚醛树脂由苯酚和甲醛缩聚而成，反应有大量热放出，为防止温度过高，已有苯酚的反应釜中_____加入甲醛，且反应釜应装有____装置。 （2）玻璃纤维由玻璃拉丝得到。普通玻璃是由石英砂、_____和石灰石（或长石）高温熔融而成，主要反应的化学方程式为______________________。 （3）玻璃钢中玻璃纤维的作用是____________。玻璃钢具有_________ 等优异性能（写出两点即可）。 （4）下列处理废旧热固性酚醛塑料的做法合理的是________。 a．深埋 b．粉碎后用作树脂填料 c．用作燃料 d．用有机溶剂将其溶解，回收树脂
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【多选题】Why is the student interested in the professor's class?
A.
He wants to learn about his family background.
B.
He already has the language skills needed for the class.
C.
The professor has a reputation as an expert on Poland.
D.
The course is related to the student's intended course of study.
【简答题】英译汉 Accurate, legible notes are invaluable to the student who is enrolled in a lecture course. Notes should be taken during lectures, and when the student is reading the texts prior to each sessi...
【简答题】下图中控制电路是如何实现两台电动机的顺序停止的？
【简答题】The student had to do a 1)__________ paper for history.There was a 2)________ book that she needed. She tried the card catalog but it was not 3)__________.Then she was told by the 4)_________ that all...
【单选题】The nursing instructor asks a nursing student to identify the priorities of care for an assigned client. Which statement indicates that the student correctly identifies the priority client needs?
A.
Actual or life-threatening concerns are the priority.
B.
Completing care in a reasonable time frame is the priority.
C.
Time constraints related to the client’s needs are the priority.
D.
Obtaining needed supplies to care for the client is the priority.
【单选题】• Don't openly express annoyance at a professor or class. ___5___ When a student attacks a professor on the social media, the language used actually says more about the student. If there is truly a co...
A.
That's what they are for.
B.
Turn to an online instructor for help.
C.
If more information is needed, they will ask.
D.
Remember that online professors get a lot of emails.
E.
Below are some common do's and don' ts for online learners.
F.
Everyone has taken a not-so-great class at one time or another.
G.
Ask questions, but make sure they are good, thoughtful questions.
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