Of all the elements in the Earth's crust, oxygen is known to be the more common.（）
A: Of all
B: elements
C: to be
D: more
A: Of all
B: elements
C: to be
D: more
举一反三
- Of the more common elements(元素) are hydrogen, oxygen, carbon, iron, copper, etc.
- The common elements in all styles of friendship include ______.
- Glial cells are unimportant structural elements of the spinal cord that do nothing more than hold all the important things together, like the nerves.
- ______ is well known to us all that the earth is round.______ is well known to us all, the earth is round.
- All of these elements will be _____ the evaluation of your performance.