Nanorods and nanowires are（）nanomaterials. A.0-DB.1-DC.2-DD.3-D 正确答案：1-D

In the fuel cell，the（）is a substance specifically designed so ions can pass through it, but electrons cannot. A.anodeB.cathodeC.catalystD.electrolyte 正确答案：electrolyte

In a lithium-ion battery, lithium ions move from the（）to（）electrode during discharge, and back when charging. A.positive electrode；negative electrodeB.positive electrode；electrolyteC.negative electrode；positive electrodeD.negative electrode；electrolyte 正确答案：negative electrode；pos … 阅读详情>> "In a lithium-ion battery, lithium ions move from the（）to（）electrode during discharge, and back when charging."

For many materials, much higher strength can be achieved in（）form than in（）form. 正确答案：fiber bulk

The physical properties of composite materials are generally not（）（independent of direction of applied force）in nature, but rather are typically（）（different depending on the direction of the applied force or load）. 正确答案：isotropic anisotropic

Composite in which the reinforcements are continuous fibers or whiskers can be produced so that the reinforcements have either random or biased orientation. A.正确B.错误 正确答案：错误

It is of great important to be able to predict the properties of a composite, given the component properties and their geometric arrangement. A.正确B.错误 正确答案：正确

The primary function of fibers or reinforcements is to carry load along the length of the fiber to provide strength and stiffness in one direction. A.正确B.错误 正确答案：正确

Fibers must often be chemically treated to ensure proper adhesion to the matrix. A.正确B.错误 正确答案：正确

The matrix typically has a higher density, stiffness, and strength than the fibers. A.正确B.错误 正确答案：错误

According to source, composite materials divided into:（） A.conductive composite materialsB.natural composite materials　 C.artificial composite materialsD.damping composites 正确答案：natural composite materials；artificial composite materials

The majority of composite use two consistuents:（） A.matrixB.fiberC.resinD.reinforcement 正确答案：matrix；reinforcement