‌S-glass fibers have higher strength than E-glass fibers.​

In the following description of the heart wall structure, the WRONG option is A: The heart wall consists of endocardium, myocardium and epicardium. B: The surface of endocardium is covered by endothelium. C: Purkinje fibers are distributed in the subendocardial layer of the ventricle (心室). D: Myocardium consists mainly of smooth muscle fibers. E: Epicardium is serosa.

The<br/>main structural features of the wall of the large arteries are:() A: more elastic membrane and cartilage B: more elastic fibers and collagen fibers C: more elastic membrane and elastic fibers D: more elastic fibers and smooth muscle fibers E: more collagen fibers

The following are descriptions of the excitatory conduction characteristics of nerve fibers. Which one is correct? A: One-way conduction can only be conducted from the cell body to the periphery. B: The fibers in the nerve trunk do not interfere with each other. C: As long as the structure is complete, it can conduct excitation normally. D: It is not affected by the change of internal environmental factors.

Slow twitch fibers are more enduring than fast twitch fibers

S-glass fibers have higher strength than E-glass fibers A: 正确 B: 错误

Nylon fibers last longer and are stronger than natural fibers _______ silk or cotton. A: A.such as B: B.as regards C: C.as well as D: D.as such

Oligodendrocytes make myelin, a fatty substance that insulates nerve axons and speeds the conduction of impulses along nerve fibers.

Modern concrete blends are reinforced with steel fibers and __________ for strength and to prevent cracking.( ) A: water reducing fibers B: water condesation polymers C: water tower D: water reducing polymers

​丝绸时髦了，人造纤维过时了。‌ A: Silk is voguish and synthetic fibers are out. B: Silk has become voguish, synthetic fibers have become outdated. C: / D: /