在筛管运输机理的几种学说当中,主张筛管液是靠源端和库端的压力势差建立起来的压力梯度来推动的,是哪一种?()
The function of the hydraulic telemotor transmitter used in an electro-hydraulic steering gear system is to ().
Pressure gradient is a measure of().
在下述筛管运输机理的学说中,()主张筛管液是靠源端和库端的压力势差建立起来的压力梯度来推动的。
植物维管组织是植物细胞水分与物质运输的主要途径,主张筛管内的物质运势是靠源端的库端的压力势差而建立的压力梯度来推动的学说是:()
植物体中水分运动一般顺水势梯度进行,一个植物细胞的水势变化受细胞膨压影响。以下有关论述正确的有()
养分电势梯度 nutrient electropotential gradient
If one hydraulic pump of an electro-hydraulic steering unit falls, the vessels steering can be initially and best maintained by using the ().
In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the ().
When the helm demands a 20°right rudder movement from an electro-hydraulic steering gear, which of the listed actions will be the FIRST action to happen when this rudder position is attained?()
When there is no movement of the rams on an electro-hydraulic steering gear, the tilting box of the running pump is ().
On the pole side of the trade wind belt,there is an area of high pressure with weak pressure gradients and light,variable winds. This area is called the().
density gradient centrifugation密度梯度离心
单一组分的过冷液体的化学势比其固体的化学势()
()与()合称电化学势梯度。
养分浓度梯度 nutrient concentration gradient
Pressure gradient is a measure of ______.
主动吸收顺电化学势梯度, 不需要 消耗能量。( )
膜分离技术是基于化学物质通过膜的传递速度的不同,以膜两侧的化学势梯度为推动力,从而使不同化学物质通过膜而达到分离效果。
在筛管运输机理的几种学说当中,主张筛管液是靠源端和库端的压力势差建立起来的压力梯度来推动的,是 。
In an electro-hydraulic steering system, rudder movement is maitained in close synchronization with the steering wheel position by means of the ______.
【填空题】利用霍尔效应测螺线管磁感应强度分布实验中的四个副效应可归结为: 、 、温度梯度电压和电极不等势电压。
3、1、溶液的化学势等于溶液中各组分的化学势之和
ATP合成酶合成ATP的直接能量来自于质子动力势(H+梯度)。()