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【单选题】
新型隐球菌用一般染色法难以着色，是因为其有A.
荚膜
B.
鞭毛
C.
芽胞
D.
孢子
E.
菌丝
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【单选题】Technology aids migration in that_____
A.
modern technology creates more jobs for the poor migrants
B.
modern technology makes migration easier and cheaper
C.
the development of technology needs more skilled youngsters from poor countries
D.
the advancement of technology makes it easier for illegal migrants to forge passports
【单选题】Science and Technology There is a difference between science and technology._____（46） Science has to do with discovering the facts and relationships between observable phenomena in nature and with est...
A.
Another distinction between science and technology has to do with the progress in each.
B.
Unlike science, progress in technology must be measured in terms of the human factor.
C.
What scientists discover may shock or anger people－as did Darwin's theory of evolution.
D.
Science and technology are different.
E.
We are all familiar with the improper use of technology.
F.
Science is a method of answering theoretical questions; technology is a method of solving practical problems. 第 46 题 请选择（46）处的最佳答案．
【简答题】What significance do you think this stage have?
【简答题】Na 2 SO 3 、SO 2 是中学常见的物质。 （1）某同学用下图示装置制取干燥纯净的SO 2 。 写出制取SO 2 气体的化学方程式 。请指出D装置中的错误 。若实验过程中不慎在皮肤上沾少量浓硫酸，处理的方法是 。 （2）向烧碱和Na 2 SO 3 的混合溶液中加入少量溴水，振荡后溶液变为无色。反应后的溶液中含有大量的SO 3 2- 、SO 4 2- 、Br - 、OH - 等阴离子，请填写...
【单选题】After you have reached the deepest sleep,______.
A.
you will stay at the fourih stage the rest of the night
B.
you will lose your consciousness for 40-60 minutes
C.
your brain waves will show the delta rhythm
D.
your brain waves will show the alpha rhythm
【简答题】根据国家环保总局的统一规定，目前进行常规大气监测的主要指标有二氧化硫、氮的氧化物、可吸入固体颗粒等三项。以下是国家关于空气的污染指数与质量级别、质量状况的对应关系表： (1)大理市2008年10月25日公布的空气污染指数为76~81，根据以上信息判断大理市当天的空气质量级别和空气质量状况分别是____和______。 (2)产生二氧化硫的污染源是____。 (3)减少空气中可吸入颗粒物的措施___...
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