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【单选题】
下列有关基因叙述正确的是（）A.
细胞核与细胞质中都存在基因，且它们都在染色体上
B.
基因就是一段有功能的核酸，可以是DNA，也可以是RNA
C.
任何生物体内的基因都遵循孟德尔遗传定律
D.
构成基因的核苷酸总共有5种
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举一反三
【简答题】The iceberg style. refers to the writing style. of the American writer __________.
【单选题】The missing binoculars were the major factor leading to the collision with the iceberg.
A.
TRUE
B.
FALSE
C.
NOT GIVEN
【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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