题目内容

维生素是有机化合物。

A. 对
B. 错

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维生素可以氧化分解提供能量。

A. 对
B. 错

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维生素A仅存在于鱼粉、鱼肝油等动物性饲料中，玉米、牧草等植物性饲料仅含胡萝卜素，不含维生素A。

A. 对
B. 错

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The highest theoretical transmission speed of 5G would be up to 10Gb per second, which will be hundreds of times faster than ( ).

A. the existing 4G network transmission speed
B. the previous 3G network transmission speed
C. the existing 3G network transmission speed
D. the previous 2G network transmission speed

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( ) A British researcher said, the mobile transmission speed of 5G network has reached. 1Tbps in stationary state.

A. On May 13,2014
B. On September 9, 2015
C. On February ,2015
D. In 2019

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维生素是有机化合物。

A. 对 B. 错

维生素可以氧化分解提供能量。

维生素A仅存在于鱼粉、鱼肝油等动物性饲料中，玉米、牧草等植物性饲料仅含胡萝卜素，不含维生素A。

The highest theoretical transmission speed of 5G would be up to 10Gb per second, which will be hundreds of times faster than ( ).

( ) A British researcher said, the mobile transmission speed of 5G network has reached. 1Tbps in stationary state.

A. 对
B. 错