请教语法GWD-4-31
Twenty-two feet long and 10 feet in diameter, the AM-1 is one of the many new satellites that is a part of 15 years effort of subjecting the interactions of Earth’s atmosphere, oceans, and land surfaces to detailed scrutiny from space.
- satellites that is a part of 15 years effort of subjecting the interactions of Earth’s atmosphere, oceans, and land surfaces
- satellites, which is a part of a 15-year effort to subject how Earth’s atmosphere, oceans, and land surfaces interact
- satellites, part of 15 years effort of subjecting how Earth’s atmosphere, oceans, and land surfaces are interacting
- satellites that are part of an effort for 15 years that has subjected the interactions of Earth’s atmosphere, oceans, and land surfaces
- satellites that are part of a 15-year effort to subject the interactions of Earth’s atmosphere, ocean, and land surface
1)请问D为什么不对?
2)在这个定语从句中,前面用are是为了和satellites一致,那么用part是因为后面的effort是不可数的吗? |