The cavity between the spinal dura and the spinal arachnoid is called ( ). A: Epidural space B: Subdural space C: Subarachnoid space D: Central canal

Please put a complete line space between each paragraph for clear.

d_________ (距离): the property created by the space between two objects or points

In ___________, every line of the letter begins at the left margin, with a space of one line between paragraphs.

The ( ) between the rich and the poor becomes wider and wider nowadays. A: space B: opening C: gap D: separation

The outside diameter of the pipe is （） the diameter of the bore of the piston rod， the result being that an annular space formed between the piston rod and the pipe.

Between the outside wall of glass and the two inside walls of glass, there is ______. A: an empty space B: another huge wall C: a triple-glazed wall

The aqueous humor? can alter the curvature of lens|fills the space between the lens and the retina;|is formed from the ciliary processes|absorbed mainly by the cornea

What<br/>is the relationship between the space charge width and doping<br/>concentration.() A: No<br/>relationship B: Proportional C: Inverse proportion D: Exponential

The rule of spelling names is very simple and easy to remember: that is to ______ the first letter of given name, ______ the first letter of family name and put a space between the given name and the family name.