【简答题】The buyers of electric or plug-in hybrid cars can enjoy a sum of $ 7,500 in ______.
【判断题】变换反应是放热反应,所以温度上升,平衡常数下降。
【单选题】抬举重物时,背部要挺直,膝盖弯曲,要用______来支撑。
【单选题】Question 1 If a market is in equilibrium ______.
A.
buyers and sellers can buy and sell all they wish at the current price.
B.
there is no tendency for the price to rise or fall.
C.
the quantity supplied equals the quantity demanded.
D.
All of the above are correct.
【单选题】下列各组词语中,没有错别字的一组是( )
【单选题】文中提到一部被不少外国学者认为只是 “老生常谈经”的中国经典 是 _____
【单选题】抬举重物时,背部要挺直,膝盖弯曲,要用_______来支撑。)