题目内容
操作系统是一组能有效地组织和管理计算机（ ）资源，合理地对各类作业进行调度，以及方便用户使用的程序的集合。
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在操作系统中，JCB是指。
在操作系统中，TCB是指（ ）。
(Telephone Talking)L: Hello? (_________)?S: Yes.L: Good morning, Mr. Smith. This is Miss Li from Guangdong Light Industrial Products Import & Export Corporation. You will be happy to hear that (_______________________________________).S: That’s good news, Miss Li. Has our order gone out of the factory yet?L: (__________________________________________________).S: Good. We would like to receive the shipment by November 1st. Is that possible?L: I’m not sure. (_________________________________________) , leaving Guangzhou on the tenth of October.S: Have you booked shipping space on s/s Dongfeng?L: Yes. (______________________________________). That is scheduled for shipment the day after tomorrow.S: When will the consignment arrive?L: We’ll let you know after (______________________________________).S: All right. Thank you.(Two days later)L: Hello, Mr. Smith. We have pleasure to inform you that (_________________________________________) and the goods are now in transit.S: Good. We’ve been waiting a long time.L: The estimated time of arrival is scheduled (____________________________________).S: That’s fine. Thank you very much.L: It’s our pleasure. Would you please inform us after (______________)?S: No problem! We’ll tell you as soon as the goods reach us.
闭式喷头是闭式自动喷水灭火系统的关键组件，它是通过（）的动作而喷水。
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