If the actual level of activity differs from what was planned, it would be misleading to evaluate performance by comparing actual costs to the static, unchanged planning budget. A: 正确 B: 错误

According to the Mundell-Fleming model， import restrictions in an economy with flexible exchange rates cause net exports to ______ and in an economy with fixed exchange rates import restrictions cause net exports to ____.（ ） A: remain unchanged; increase B: remain unchanged; remain unchanged C: increase; remain unchanged D: increase; increase

7. A: unattractive B: uncrowded C: unchanged D: unfamiliar

What do we learn about America’s education system? A: It provides a ladder of opportunity for the wealthy. B: It contributes little to the elimination of inequality. C: It has remained basically unchanged for generations. D: It has brought up generations of responsible citizens.

Which of the following phenomena belongs to an adiabatic process ?() A: The temperature of the system remains unchanged B: The system does not absorb heat from the environment C: No heat exchange between the system and the environment D: The internal energy of the system remains unchanged

Men of the Miaos from Basha of Congjiang have maintained their lifestyles unchanged for thousands of years.

All other things unchanged, the narrower the span of control, the more efficient the organization is.

The unchanged personalities of the man were________. A: self-centered B: insensitive C: talktive D: inconsiderate

At school, my children already ___valentines with their classmates. A: changed B: exchanged C: unchanged

If the price elasticity of demand for a good is 1; then doubling the price of that good will leave total expenditures on that good unchanged