1. the whole atmosphere of the world in which we live is tinged by science, as is shown most immediately and strikingly by our modern conveniences and material resources.

이 문장에서 as is shown 에서 왜 주어가 없죠?ㅠ 주어가 science 인가요? 근데 as 는 관계대명사도 아닌데 왜 주어를 생략한거죠?ㅠㅠ

2. this conviction is the most important single gift of science to civilization. 여기에서요 important 라는 형용사와 single 이라는 형용사가 동시에 나올수 잇나요?ㅠㅠㅠㅠ