Sunlight can be used to ______ electricity.
A: producing
B: be producing
C: have produced
D: produce
A: producing
B: be producing
C: have produced
D: produce
举一反三
- In the last few years thousands of films ______ all over the world. A: have produced B: have been produced C: are producing D: are being produced
- 33.Do you know what ______ so much greenhouse gases in the air? A: producing B: has produced C: will produce D: produces
- Individuals Lin<br/>and Li<br/>both produce good X. Lin has a<br/>comparative advantage in the production of good X if Lin ( ) A: has a lower opportunity cost of producing good X than<br/>has Li. B: has a lower opportunity cost of producing good X than<br/>of producing good C: can produce more units of X in a given time period<br/>than can Li. D: can produce X using newer technology than can Li.
- If country A has a comparative advantage in producing shoes, then________________________.（ ）. A: other countries will never produce shoes if trade is allowed B: it can produce shoes at lower opportunity costs than other countries can C: it has more factors of production used in the production of shoes relative to other countries D: it can produce shoes using more resources than other countries can
- -- How much is the latest style of the watch?[br][/br] -- Sorry, I have no idea. But it and I' will know the price soon. A: has produced B: has been producing C: is produced D: is being produced