Physicists have made new discoveries that challenge our（）theories of the universe.
A: existed
B: adapted
C: accepted
D: established
A: existed
B: adapted
C: accepted
D: established
举一反三
- . Physicists have made new discoveries that challenge our ______ theories of the universe.
- The old rules have to be ______ because they only applied to the circumstances that existed when they were made a hundred years ago. A: developed B: established C: observed D: revised
- The new discoveries there have ____ greatly to our knowledge of the ancient civilization in China. A: attached B: proceeded C: added D: contributed
- What do both theories assume to be true A: That new material is continually being formed. B: That, in time, the universe will contract. C: That the universe is expanding at present. D: That "a big bang" started the expansion.
- A series of brilliant scientific discoveries _____ made by them. A: have B: was C: has D: are