赞题库-背景图

单项选择题

骨骼肌细胞收缩和舒张最基本的功能单位是( )。

A．线粒体
B．肌小节
C．细胞核
D．细胞膜

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热门试题

单项选择题What does the passage say about Maradona

A．He is England’s old enemy.
B．He wants technology in football.
C．He is a great fan of England.
D．He feels sorry for England.

单项选择题Which of the following is NOT true according to the passage

A．A “cycle revolution” happened at the turn of the 20th century.
B．Around 40,000 journeys a day will be made on the rental bikes.
C．A fifth of all London journeys were on bicycles over 100 years ago.
D．People are supportive of the bike rental scheme when it started.