题目内容

ISO认定的物流基础模数尺寸是（）

A. 500㎜300㎜
B. 600㎜400㎜
C. 800㎜600㎜
D. 1000㎜600㎜

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For thousands of years yoga was practiced _________.

A. all over the world
B. mainly in India
C. mainly in the West
D. mainly in the United States

Yoga was known to the West____________.

A. more than 5,000 years ago
B. after the 1960s
C. in recent years
D. for thousands of years

Nowadays, westerners parctice __________.

A. all kinds of yoga
B. baby yoga
C. hot yoga
D. yogic meditation

当交流侧接在电网上，即交流侧接有电源时，称为（）逆变。

A. 有源
B. 无源
C. 电压型
D. 电流型