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You should _______________ to one or more weekly magazines such as Time or Newsweek.

— ___________________

— Once or twice a week.

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

Whether we will go or not __________ the weather.
Which ________ do you prefer, coffee or orange juice?
在斜二等轴测图中,取一个轴的轴向变形系数为0.5时,另两个轴向变形系数为_______。
Tables______ of stones or wood.
Without water, _________ no plants or animals.
I am wondering if they are ____ or____.
_________ in a person’s speech or writing usually ranges on a continuum from casual or colloquial to formal or polite according to the type of communicative situation.
__________ is the act performed by or resulting from saying something; it is the consequence of, or the change brought about by the utterance.
对于改变梁的受力情况,有以下做法 (1)合理布置梁的支座 (2)合理布置载荷 (3)将分布载荷改变成集中载荷 其中做法正确的是_______________
轴向拉伸(压缩)时,在杆件的横截面上,正应力为________值;在与杆件轴线方向 45°的斜截面上,剪应力为 _______值。
在满足通道设计流量不低于设备工作时的最大流量时,为微观上不丢失设备信息,可以加设_________或动态改变设备响应的_________来弥补。
在液压技术中,压力与流量的乘积即为 ____。
液压泵的理论流量是____ 和 ____ 的乘积。
斜盘式轴向柱塞泵的缸体、柱塞、斜盘、配油盘中随输入轴一起转动的为____、____。
根据改变流量方式的不同,液压系统的调速方法可以分为三种:____、容积调速、____。
斜盘式轴向柱塞泵改变流量是靠改变______。
Many boys enjoy _______ football, basketball or baseball
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