ults obtained by science and his own engineering skill, take upon himself the final shaping of ......

g congestion is to create more of it.　　Partial decentralization, or rather pseudo-decentraliz......

The tragic impact of modern city on the human being has killed his sense of aesthetics. The mat......

ccess of the immune system in distinguishing foreign substances.　　[B] the normal and abnormal......

brain in intricacy.　　[C] is enclosed by numerous sensitive cells.　　[D] results in an effect......

millions of distinctive non�瞫elf molecules in the sea of microbes in which we live, learning n......