单选题：Paragraph 3 __________

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题目内容：
Paragraph 3 __________ A．Reasons for HIV Resistance
B．Implications of Chimpanzee Extinction for Humans
C．Effective AIDS Treatment
D．Genetic Similarities between Chimps and Humans
E．Chimps' Resistance to HIV
F．Genetic Differences between Chimps and Humans

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在考生文件夹下有一个工程文件sjr5．vbp，在其窗体中有一个实心圆。程序运行时，当用鼠标左键单击窗体任何空白位置时，实

在考生文件夹下有一个工程文件sjr5．vbp，在其窗体中有一个实心圆。程序运行时，当用鼠标左键单击窗体任何空白位置时，实心圆则向单击位置直线移动；若用鼠标右键单

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十进制整数127转换为二进制整数等于（　　）。A．1010000 B．0001000 C．1111111 D．1011000

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Some Canadian officials want to keep the door open because

Some Canadian officials want to keep the door open becauseA．Canada is in despera

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This passage mentions all of the following causes for the e

This passage mentions all of the following causes for the extinction of many sp

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