I am not very hungry, so I will have just a little_______of salad.
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My cousin and his best friend want to ______a company.
Marlow and Ana will_______food for the party next week
I might_______my idea for the assignment.
关于光电效应,错误的说法是:
A. 金属及其化合物在光照射下发射电子的现象,称为光电效应
B. 金属在单位时间内所发射的光电子数,与照射光的光强成正比
C. 无论照射光频率是多少,都会产生光电效应
D. 光电子的最大初动能与照射光强度无关,而与其频率成线性关系