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【简答题】
直接生成碳-碳键的反应是实现高效、绿色有机合成的重要途径．交叉脱氢偶联反应是近年备受关注的一类直接生成碳-碳单键的新反应．例如： 化合物I可由以下合成路线获得： （1）化合物I的分子式为______，其完全水解的化学方程式为______（注明条件）． （2）化合物II与足量浓氢溴酸反应的化学方程式为______（注明条件）． （3）化合物III没有酸性，其结构______；III的一种同分异构体V能与饱和NaHCO 3 溶液反应放出CO 2 ，化合物V的结构______． （4）反应①中1个脱氢剂IV（结构图 ）分子获得2个氢原子后，转变成1个芳香族化合物分子，该芳香族化合物分子的结构______． （5）1分子 与1分子 在一定条件下可发生类似①的反应，其产物分子的结构______；1mol该产物最多可与______ molH 2 发生加成反应．
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【简答题】The iceberg style. refers to the writing style. of the American writer __________.
【简答题】The Iceberg style. is most thoroughly reflected in the writings of the American novelist _____________. A.Jack London B.Ernest Hemingway C.Mark Twain
【简答题】The collision with the iceberg was fatal because ______ watertight compartments were flooded.
【单选题】What happened once the iceberg had been spotted?
A.
The Titanic got lost in the icy waters of the North Atlantic.
B.
The alarm was given that there was a collision ahead.
C.
The Titanic quickly changed her course.
D.
The Titanic turned just as the iceberg rose steeply out of the water.
【简答题】“冫”在部首目录中的第( )页。
【判断题】The visible part of an iceberg is supported by the invisible part which is the powerful foundation of the iceberg.
A.
正确
B.
错误
【单选题】Why does the author say that “this is the tip of the iceberg” in the last paragraph?
A.
Because to create smart textiles is as tough as breaking iceberg.
B.
Because more and more companies and designers will create smart textiles and develop technology in the future.
C.
Because designers are reluctant to develop the technology.
D.
Because the designers and companies need to extract the essential substances for the smart textiles from the iceberg.
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