膨化食品如薯片、雪饼等，属于（）类食品，不能经常食用。
A、高油脂
B、高热量
C、低粗纤维
D、低糖
参考答案：A, B, C
If the money supply increases and the price level declines, according to the quantity theory of money, velocity:（）
A. declined and output rise, or velocity rise and output remained constant.
B. remained constant and the growth rate in output fell more than enough to compensate for the decline in prices.
C. declined and output rise; or velocity remained constant and the growth rate in output rose more than enough to compensate for the decline in prices.
19世纪初使化学成为一门真正的科学的是( )。
A．波义耳
B．拉瓦锡
C．道尔顿
D．阿伏伽德罗
