现代天文学通过引力透镜、宇宙中大尺度结构形成、天文观测和膨胀宇宙论研究发现:宇宙的密度可能由70%的暗能,5%的发光和不发光物体,5%和热暗物质和20%的冷暗物质组成。这体现了( )
---I love the Internet. I’ve come to know many friends on the Net. ---_______ .Few of them would become your real friends.
Not until he retired from teaching three years ago _______having a holiday abroad .
_______hard you try, it is difficult to lose weight without cutting down the amount you eat .
A lot of language learning ,_______has been discovered, is happening in the first year of life, so parents should talk much to their children during that period .
That Jill was worried seemed _____ to everyone present at the meeting.