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【简答题】
能源与环境已成为人们关注的热点. (1)煤、石油、______属于化石燃料.要节约现有能源,还要开发新能源,如:地热能、核能、______(填一种即可)等. (2)科学家预言,氢能源将成为21世纪的主要绿色能源,而自然界中广泛存在的物质,如图请你写出获取氢气的化学方程式______. (3)含硫煤燃烧排放的SO 2 会引起“酸雨”现象.为减少大气污染,某发电厂采用了“石灰固硫法”,即中掺入生石灰(CaO),在氧气参与反应和高温的条件下,用来吸收SO 2 ,只生成硫酸钙,写出该反应的化学方程式______. (4)“绿色化学”的特点之一是“零排放”.一定条件下,一氧化碳和氢气可以按照不同比例反应,若只生成一种产物就能实现“零排放”,符合这一要求的产物是______(填字母序号). A.甲醇(CH 4 O)  B.甲醛(CH 2 O) C.乙醇(C 2 H 6 O)  D.乙醛(C 2 H 4 O)
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【单选题】There are many ways to express our feelings of loneliness, such as writing diaries, writing imaginary letter, drawing a picture and so on.
A.
Y
B.
N
C.
NG
【简答题】蜜蜂或其它昆虫在花丛中飞舞、爬行时,就会把雄蕊的花粉传播到 的柱头上,这会使雌蕊子房里的 受精后发育成长形成 。
【单选题】三相感应电动机等效电路中的附加电阻 上所消耗的电功率应等于 。
A.
输出功率
B.
电磁功率
C.
总机械功率
D.
铁耗
【单选题】三相感应电动机等效电路中的附加电阻 (1-s) R'2/s上所消耗的电功率应等于( )。
A.
输出功率P2
B.
输入功率P1
C.
电磁功率Pem
D.
总机械功率PΩ
【单选题】The author implies that in the development of man, ______.
A.
speech, agriculture and writing are the most important factors
B.
the origin of the language can not be traced
C.
both oral language and written language come out of the picture language
D.
the ape might be taught to master speech
【简答题】A.Reading in the afternoon. B.Reading in the morning. C.Reading in the evening. D.Doing morning reading right after getting up.
【单选题】______, tears came to her eyes.
A.
Reading the letter
B.
While reading the letter
C.
As she was reading the letter
D.
To read the letter
【单选题】三相感应电动机等效电路中的附加电阻 上所消耗的电功率应等于:
A.
输出功率
B.
输入功率
C.
电磁功率
D.
总机械功率 。
【单选题】____ aloud in the reading room is a bad habit. [     ]
A.
Read
B.
To reading
C.
Reading
【单选题】The Grammar-Translation Method neglects______.
A.
listening and reading
B.
speaking and writing
C.
reading and writing
D.
listening and speaking
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