搜题请搜索小程序“爱下问搜题”
问题 填空题

已知（x-p）（x+3）=x2+2x+q，则p+q=______．

答案

∵（x-p）（x+3）=x2+（3-p）x-3p=x2+2x+q，

∴3-p=2，-3p=q，

解得：p=1，q=-3，

则p+q=1-3=-2．

故答案为：-2

单项选择题

As the name implies, CTI (Computer-Telephone-Integration) is the fusing of telephone operations with those performed by a computer. CTI has actually been around for a good two decades. Until recently, it required users to (36) a good deal of knowledge about telephone interconnect processes as well as networking and database programming to (37) even the most rudimentary tasks. These two skill sets are rarely possessed by the same individual.

But today CTI has gone client/server. Microsoft corp. has included its client-side Telephony API (TAPI) with every copy of Windows 95. The company’s service-side TAPI is now available for Windows NT. There are many telephony (38) that turn the interconnect portion of a CTI (39) into standard data programming, and low-cost, easy -to- create telephony is born. Better yet, many of these (38) are Visual Basic add-ons. CTI is also subject to all the cost benefits of cheaper, PC-based hardware.

The two portions of CTI are (40)

（40）是（）

A.interconnectionandTelephonytoolkits

B.interconnectionandVisualBasicall-ones

C.interconnectionandprogramming

D.networkinganddatabaseprogramming
查看答案
单项选择题

甲、乙、丙3人植树，甲植1棵树的时间乙可植2棵，丙可植3棵，他们先一起工作5天完成全部任务的，然后丙休8天，乙休3天，甲没休，最后一起完成任务，问：从开始植树算起共用（）天才完成任务，丙植树占全部任务的（）。

A．20，40%

B．20，30%

C．15，30%

D．15，40%
查看答案