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问题 单项选择题

烟火药的干燥方法不可采用( )。

A．日晒

B．明火烘烤

C．热风散热器

D．暖气炉烘烤

答案

参考答案：B

解析：烟火药的干燥一般采用日光、热风、蒸气、红外线、远红外线。严禁用明火。

解答题

已知函数f（x）=（x2+bx+c）ex在点P（0，f（0））处的切线方程为2x+y-1=0，

（Ⅰ）求b，c的值；

（Ⅱ）求函数f（x）的单调区间；

（Ⅲ）若方程f（x）=m恰有两个不等的实根，求m的取值范围。
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单项选择题

Personal computers are used by one person at a time. The largest personal computer, or PCS, can fit on a (1) . Some of these (2) have more than one microprocessor. (3) the primary processor, which is a general-purpose device, a PC may have one or more processors to (4) special kinds of work. Some machines, (5) , have maths processors, others have graphics processors to help process photographs and other illustrations. Still others have (6) processors.
Office workers also use PCS that are not (7) to a network. These machines are used for (8) tasks as word processing, performing financial calculations, and organizing and (9) bodies of information called databases. People use PCS at (10) for some of the same kinds of tasks. They use word processing programs for (11) Communication, financial software for household budgets. Individuals also use their home computers to play (12) and to communicate (13) the internet.
Small, portable PCS are (14) with people who often work away from their desks. The (15) include laptop computers, which can be (16) on the lap; notebook computers, which are about the (17) of a loose leaf notebook; and palmtop, or handheld computers, which can be operated while (18) in the hand. Laptop and notebook computers have the same (19) as desktop computers. Palmtop computers have less power but still (20) some advanced capabilities. For example, they can process household financial data.

二、完形填空

A．provide

B．supplied

C．offer

D．give
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