周至

Lintong belongs to resource driving type ; Chang an, Lantian , Huxian , Zhouzhi belong to demand driving type.

现阶段,市区属于综合驱动型,临潼区属于资源驱动型,长安区、蓝田县 、 户县、周至县 、 灞桥区属于需求驱动型.

These outcomes suggest that prolonging pregnancies beyond 34 weeks may be desirable whenever possible.

这些结果显示尽一切可能延长孕周至34周之后是值得的.

They typically center on a range of 1 . 5 to 4 cycles per second.

频率集中在每秒1.5周至每秒4周之间.

The frequency of beta waves ranges from 15 to 40 cycles a second.

β波的频率在每秒15周至每秒40周之间.

This frequency range is normally between 5 and 8 cycles a second.

频率通常在每秒5周至每秒8周之间变化.