6.1交点计算 6.2几何图形的关系判别 6.2直线段裁剪

一、用图形软件包绘图 二、基本的交互处理 三、光栅操作

一、计算机图形学包括哪些外部设备? 1、图形输入设备:概念、特点 2、图形显示设备:概念、结构原理、工作方式、特点* 3、图形输出设备:概念、特点

第一节 经验免疫学时期 第二节 科学免疫时期 第三节 现代免疫学时期

KEY: GRAMMAR 1-5 CABAC 6-10 ADBAC 11-15 ACBAB 16-20 CACCD 21-25 BDABC 26-30 DCBCA 31-35 CCDAB 36-40 DABAC

Grammar Directions: There are 80 sentences in this section. Beneath each sentence there are four choices. Choose one word or phrase that you think best completes the sentence

Band 3 Practice Exercise I.GRAMMAR Directions: There are 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the word or phrase that you think best completes the sentence

VOCABULARY Section A Directions: There 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the one word or phrase that you think best completes the sentences

GRAMMAR Directions: There are 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the one word or phrase that you think best completes the sentence

VOCABULARY Section A Directions: There 80 sentences in this exercise. Beneath each sentence there are four choices. Choose the one word or phrase that you think best completes the sentences