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【单选题】
What can we conclude from this passage?A.
Water is almost as important as food.
B.
Many people tend to neglect the importance of water.
C.
Water is the origin of life.
D.
Most fruits and vegetables contain much water.
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举一反三
【单选题】Over three centuries, more than 10 million African slaves were imported into the Americas.
A.
True
B.
False
【单选题】Beijing Municipal Government (allocated) more than 10 million yuan for the project.
A.
减轻
B.
分配
C.
宣称
【多选题】The Czech Republic has a population of more than 10 million, with such ethic groups as ______.
A.
Czechs
B.
Slovaks
C.
Ukrainians
D.
Moravians
【简答题】More than 10 million Sony PlayStations __________(sell) in the next year.
【判断题】Over three centuries, more than 10 million African slaves were imported into the Americas.
A.
正确
B.
错误
【单选题】有如下合成路线，甲经二步转化为丙： 下列叙述错误的是 （ ）
A.
物质丙能与新制氢氧化铜反应，溶液呈绛蓝色
B.
甲和丙均可与酸性KMnO 4 溶液发生反应
C.
反应（1）需用铁作催化剂，反应（2）属于取代反应
D.
步骤（2）产物中可能含有未反应的甲，可用溴水检验是否含甲
【简答题】Averagely, how many people are killed, injured or permanently disabled in car accidents each year according to the passage? A) Three million. B) Eigh million. C) 250,000. D) More than...
【单选题】下列说法不正确的是
A.
将一块未擦去氧化膜的铝片放入适量0.5mol·L -1 CuSO 4 溶液中，铝片表面无明显现象
B.
向其中一支试管中加入1mL乙醇，向另一支试管中加入约1.5g苯酚。再向上述两支试管中各加一小块吸干煤油的金属钠，比较乙醇和苯酚中羟基上氢原子的活泼性
C.
用新制氢氧化铜可以检验牙膏中是否含有甘油，新制氢氧化铜与甘油反应生成绛蓝色溶液
D.
用稀KMnO 4 酸性溶液可以检验火柴头燃烧时是否产生了二氧化硫气体
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