【单选题】Try your best to run fast, ________ you will fall behind others. [ ]
【单选题】. As Christmas draws near, they feel more and more uneasy with their stored money ____.
【多选题】我校学生小明在外实习期间需要查找论文资料,他可以直接访问哪个数据库进行查找?
【单选题】It is said that the transport company will soon run ______ petroleum.
【单选题】Beginning from a long run equilibrium in an increasing cost industry, if there is a substantial, permanent fall in demand for industry output:
A.
firms will leave the industry, the quantity produced will fall, and prices will end up lower than their initial long run equilibrium level.
B.
firms will leave the industry, the quantity produced will fall, and prices will end up higher than their initial long run equilibrium level.
C.
firms will leave the industry, the quantity produced will fall, and prices will end up at the same level as their initial long run equilibrium level.
D.
firms will enter the industry, the quantity produced will rise, and prices will end up lower than their initial long run equilibrium level.
【单选题】If oil supplies run out, the man may have to fall back on the horse.(改错题)
【单选题】《敕勒歌》选自《乐府诗集》,是 南北朝 时期黄河以北的北朝流传的一首民歌,一般认为是由( )译成汉语的。