50. The photovoltaic effect is ...
A. the process of operating a solar car.
B. the process of absorbing photons from the sun.
C. the developing of solar cars and solar powered devices.
D. the converting of heat from the sun into electricity.
1A; 2C; 3D; 4C; 5D; 6B; 7D; 8A; 9B; 10C; 11C; 12B; 13D; 14C; 15B; 16B; 17B; 18D;
19C; 20C; 21C; 22D; 23C; 24D; 25A; 26C; 27D; 28B; 29D; 30C; 31D; 32B; 33B; 34B;
35C; 36B; 37D; 38C; 39D; 40A; 41D; 42C; 43A; 44D; 45B; 46A; 47C; 48D; 49B; 50D
ELIB.VN: THƯ VIỆN TRỰC TUYẾN MIỄN PHÍ 9
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