1.1用真值表证明下列恒等式: (1)B=A⊙B=B1 (2)A(B⊕C)=AB⊕AC (3)(+B)(+C)(B+C)=(a+b)(a+c) 1.2用基本定律和运算规则证明下列恒等式: (1)(A+B+C)(A+B+C)= AB+ AC +BC (2)ABD+ ABD+ABC AD+ ABC (3)A+ABC+ ACD +(C+D)E =A+CD+E (4)AB +AC'+BC= ABC ABC

一、填空题 1、消防管理的方针是 2、交通信号灯按其显示意义的作用,可分为 、车道灯和人行横道灯。 3、全国火灾报警电话号码统一规定为 二、单项选择 1、用惰性气体稀释空气中的氧气含量,使燃烧物质缺氧而熄灭的灭火方法是() A.冷却灭火法:B.窒息灭火法; C.隔离灭火法;D.抑制灭火法

第十四章糖类化合物 1.是写出D-(+)葡萄糖与下列试剂反应的主要产物 （1)羟胺 （2)苯肼 （3)溴水 （4)硝酸 （5)高碘酸 (6)乙酐

1.比较铜族元素和碱金属元素的异同点。 2.计算出电对[Cu(NH3)4]2/Cu的值。在有空气存在的情况下Cu能否 1mol-L溶于1'NH33h20中形成0.010mol·的[Cu(NH3)2?

9.4 海洋有机磷农药污染 9.4.1 海洋有机磷农药概述 9.4.2 海洋有机磷农药污染危害 9.4.3 海洋有机磷农药来源 9.4.4 海洋有机磷农药分布 9.4.5 海洋有机磷农药降解 9.4.6 海洋有机磷农药污染的防治措施 9.5 海洋合成洗涤剂污染 A. 基本定义 B. 洗涤剂的类型 C. 海洋洗涤剂的来源 D. 海洋洗涤剂的危害 E. 海洋洗涤剂的降解 F. 海洋洗涤剂的防治

In this example, the domain is the set fa,b, c, d, el and the range is the set Y= (1, 2, 3, 4, 5/. Related elements are joined by an arrow. This relation is a function because every element on the left is related to exactly one element on the right. In graph-theoretic

Problem Set 3 Prof. Gene Chang (For Ph. D students, due on Dec. 28th in the class, or TA's office. For M.A. students, due on Dec. 26th, in the class or TA's office. Late turn-in may result in a penalty in the grade) 1. Kland is a Robinson Crusoe type economy. Robinson, as the consumer and the owner of the firm, has the utility function U(x,) =aIn x+ BInI, where is leisure. Robinson's endowment

一、单项选择题 1.氧气湿化瓶的处理不妥的是 A.装入冷开水 B.水量为2/3满 C.通气管浸入液面以下 D.氧气雾化吸入时瓶内不放水E.湿化瓶内的水定时更换

Vocabulary structure Directions: Choose the best answer to complete each of the following sentences 1.The assignment for Thursday is to write composition about your hometown A)a five-hundred-words B)a five-hundred-word C)a five-hundreds-word D)a five-hundreds-words

Physics 121, Sections 9, 10, 11, and 12 Lecture 7 Today's Topics Homework 3: Due Friday Sept 23@ 6: 00PM Ch.3:#64.75,and81 ←Ch4:#4,8,21,25,36,and40 e Chapter 4: Motion in 2-D Projectile motion Relative velocity ← More examples of FBDs