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【简答题】
用来表示在太阳能电池上的光能量转换成电能的大小,一般用输出能量与入射的太阳能量之比来表示。
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举一反三
【单选题】听力原文：W: Hello? M: Hello, Linda? W: Hello, Abruzzi. M: Look, what are you doing on Tuesday night? There is a great show at the Grand Theater. W: Tuesday night? Oh, sorry, I'm planning to finish my term...
A.
She will stay home.
B.
She will go the concert with Abruzzi.
C.
She will invite Abruzzi to a concert.
D.
She has not decided yet.
【单选题】听力原文：W: Is it snowing out? M: Is it snowing out? Look at my clothes, they're soaked. Q: What does the man mean? (19)
A.
He's looking for his raincoat.
B.
He's soaking his clothes.
C.
He wants to close the window.
D.
He got caught in the snow.
【单选题】听力原文：M: You look absolutely exhausted! W: I know. How do you manage to look so fresh and handsome after eleven hours work? What happened to the man last week?
A.
He met the woman's friend in the street.
B.
He heard from their friend.
C.
He met their friend in the street.
D.
He telephoned the woman' s friend.
【单选题】—Please _______ at the picture. What can you _______ in it? —A guitar and a hat.
A.
see; look
B.
look; watch
C.
look; see
D.
watch; see
【简答题】将(讲话或文章)压缩
【简答题】在Windows中,可以利用“计算机”或“_____”来管理文件和文件夹。
【单选题】What w ill the employer look for during the interview?
A.
Your good look.
B.
Your qualities.
C.
Your social relations.
D.
our qualifications.
【单选题】在Windows操作系统中,可以使用文件夹来对文件进行分门别类的管理。同样,在Flash中,也可以使用( )来管理图层。
A.
图层面板
B.
图层文件夹
C.
库面板
D.
时间轴面板
【简答题】多选题 1.无性繁殖有以下优势（ ）。
【单选题】下列有关有性繁殖和无性繁殖说法正确的是
A.
有性繁殖的繁殖系数小、幼苗生活力和适应性强。
B.
有性繁殖的优点是能保持母株的优良性状，开花早。
C.
无性繁殖以植物营养器官进行繁殖，期间不经过减数分裂和受精作用，因而保持了亲本的全部特性。
D.
无性繁殖的缺点是开花晚，成活率低。
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