当汽压降低时，由于饱和温度降低，使部分水蒸发，将引起锅水体积（）。
参考答案：膨胀
It has been announced recently that all the schools________ not have the students attend school if the
students have high temperatures.[ ]
A. need
B. shall
C. could
D. ought to
为了简化会计核算工作，数额较小的应该待摊和预提的费用，也可以不作为待摊、预提费用处理，而全部计入支付月份的成本、费用。（）
