听力原文:W: Hello?
M: Hi, Mary, this is Bill Johnson.
W: Oh hi, Bill. You weren't in engineering class today, were you?
M: I have the flu. I was wondering if you could tell me what went on.
W: Actually we had an interesting class. Dr. Kelvin talked about a new type of fuel.
M: Oh, yeah?
W: Uh-hum. It's called dimethylether or DME.
M: Oh, I remember reading something about DME, but I don't remember the chemical terminology. It's mostly used in spray cans, right?
W: Right. DME doesn't destroy the ozone, so it's been environmentally friendly.
M: But doesn't DME pollute the air if it's burned in an engine?
W: Dr. Kelvin said something about its exhausts being clear, that it doesn't release as much pollutants as diesel fuel. And he mentioned something about DME being more efficient than other alternative fuels.
M: When can it replace diesel fuel?
W: Not for a while. It's not economical to mass-produce.
M: Well, thanks for the information. I guess I won't need to borrow your notes.
W: Well, maybe you should look at them. We are having a test next week.
M: Okay, could you give them to Bill Stanford? I think he is in your psychology class. He is my roommate.
W: Sure. I hope you're feeling better soon.
M: Thanks. Me, too. Bye!
W: Bye!
(23)
A.Economical fuel.
B.A new kind of fuel.
C.Energy saving.
D.Air pollution.
第1题
A.过程
B.进程
C.线程
D.作业
第2题
①根据输入条件把数目极多的输入数据划分成若十个有效等价类和若干个无效等价类。
②设计一个测试用例,使其覆盖(42)尚未被覆盖的有效等价类,重复这一步,直至所有的有效等价类均被覆盖。
③设计一个测试用例,便其覆盖(43)尚未被覆盖的无效等价类,重复这一步,直至所有的无效等价类均被覆盖。
因果图方法是根据(44)之间的因果关系来设计测试用例的。
在实际应用中,一旦纠正了程序中的错误后,还应选择部分或全部原先已测试过的测试用例,对修改后的程序重新测试,这种测试称为(45)。
A.等价类划分
B.边界值分析
C.因果图
D.判定表
第6题
A.correspondent
B.comparable
C.similar
D.analogous
第7题
①硬件资源共享
②软件资源
③数据
A.①②③
B.②③
C.①③
D.①②
第8题
A.增大传输距离
B.提高传送速度
C.增强抗拉性
D.减少外界干扰
第9题
A.信息
B.命令
C.程序
D.模型
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