单选题Data is the plural form of ______ , it is rarely used.
单选题According to the passage, any vacation from thinking should be taken ______ .
单选题Only when we had finished all the work ______ that it was too late to take a bus home.
单选题The criminal didn"t realize the value of freedom ______ he had lost it.
单选题New York Student Housing Center
We have got what students are looking for in off-campus housing. Come and see our houses-safe, affordable and convenient for living. All the facilities that you are concerned about are available, such as cable TV, Internet access, fully furnished (提供家具的) and ready for moving in! We also have comfortable apartments or rooms for roommate share. The rent may be paid weekly, monthly or yearly. Contact us at 800--298--3579 if you are interested.
单选题As your complaint does not agree with the result of our test，please conduct another examination to show if there is any ground for your claim．
单选题We don't deny that your products are superior in quality to______ of Japanese make.
单选题Ellsworth laid his conclusion on ______ .
单选题Most of the people who are visiting Britain ______ about the food and weather there.
单选题To relax himself before sleep, the writer often______.
问答题发信人：马克·怀特2．收信人：李先生3．内容：马克·怀特收到李先生2006年1月6日的请柬，但因为他要到香港参加交易会而不能接受邀请，故于1月10日回信说明原因，并拟订在3月登门拜访。
问答题Jim Green于2006年1月15日早上乘坐108次快车从深圳到北京，托运一个皮箱，但去取行李时，皮箱丢了，托运牌号为100859，里面有重要物件，以Jim Creen的名义给北京车站写封信，说明上述情况，希望车站给予查找，并及时通知，通讯地址：北京市北京酒店227房间，电话：85305101。
问答题说明：假定你是一家办公设备进出口公司的经理王刚，给某人写一封信。
内容：
1．告诉对方你获得信息的渠道：从《城市商报》(Urban Commerce)上看到对方公司的介绍；
2．说明你去信的目的：询问对方是否有你需要的产品，是否有现货供应，等等，并想和对方建立贸易联系；
3．介绍你公司的情况，如：多年从事进出口贸易，在中国设有6家分公司，与国内许多大商店有联系，等等：
4．希望尽快得到回复。
注意信函格式!
填空题By the end of next month, we (find) ______a good solution to the technical problem.
填空题None of us will have any trouble (solve) ______ such a problem.
填空题I am sure the secretary who has just been hired will prove to be an efficient (employ) ______.
填空题( )数字图像处理 ( )电路测量技术
填空题We all felt excited when China succeeded in (launch) ______its first manned spaceship.
填空题Jack must (go) ______ away—we can"t find him anywhere in the factory.
填空题( )软件技术基础 ( )信号与线性系统