___certain that his invention will lead to the development of production
A: That is
B: This is
C: It is
D: It has
A: That is
B: This is
C: It is
D: It has
举一反三
- ____ certain that his invention will lead to the development of production. A: That's B: This is C: It's D: What's
- Professor Thring's mechanical coal miner ______. A: has already been seen by the Coal Board B: is his first invention C: looks like a TV camera D: is not yet in production
- Recently, the United States has ceded its early lead in wind development to Asian competitors.
- An advance in technology will A: not shift the production function but will lead to a movement down along the production function. B: shift the production function downward. C: not shift the production function but will lead to a movement up along the production function. D: shift the production function upward.
- Are you certain that this is in his letter? A: grandfather expressed B: what grandfather has expressed C: grandfather has expressed D: which grandfather has expressed