非法垄断技术、妨碍技术进步或者侵害他人技术成果的技术合同()。
A.部分有效
B.部分无效
C.全部有效
D.全部无效
参考答案:D
B.线圈中有感应电动势,其大小与磁通量成正比
C.线圈中一定有感应电流
D.线圈中有感应电动势,其大小与磁通量的变化量成正比
China is a country _____ 56 different nationalities, among which Han _____ the majority of its population. [ ]
A. making up of; consists of
B. consisting of; makes up
C. made up of; consisting of
D. consisted of; making up of