A、What are the most efficient energy-saving measures of air-conditioning systems in public places?
B、Nuclear fission reactors should be deployed and used to generate electricity from nuclear fuel for civilian purposes.
C、Solar power provides an alternative to conventional energy resources.
D、America’s anti-pollution efforts should focus on privately owned hybrid cars.
A、The basic unit that constitutes secondary structure of polypeptide chain.
B、The two α carbons are in the cis configuration.
C、The single bond to the α carbon can rotate freely.
D、The relative positions of the two adjacent peptide units are independent of rotation of the single bonds on either side of the α carbon.
A、they also include barter agreements
B、they provide a dynamic picture of development
C、they don't consider differences in the cost of living
D、they don't consider exchange rate
A、Purchasing power parity (PPP) adjustment
B、Human Development Index
C、Debt to GNI ratio
D、Consumer Price Index
A、it fails to include income earned from other countries in the form of dividends.
B、it doesn't consider differences in the cost of living
C、it gives a static picture of development
D、large amounts of economic activity may be in the form of barter agreements.
A、A. all productive activities are owned by the state.
B、production is determined by the interaction of supply and demand
C、collectivist goals are given priority over individual goals.
D、D. the prices at which goods are sold is determined by the government.
A、market
B、private
C、command
D、mixed
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