单项选择题

运动前的准备活动宜采用哪种方式进行热身？

A．动态伸展
B．静态伸展
C．无所谓

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单项选择题

Which statement is true about leaf anatomy from a legume grown in different light environments?
A、The sun leaf is much thicker than the shade leaf.
B、The shade leaf is much thicker than the sun leaf.
C、The sun leaf is as thick as the shade leaf.
D、None of the others

多项选择题

电桥放大电路可以用于()

A．电阻应变式传感器
B．电感式传感器
C．电容式传感器
D．光电式传感器