反应性空泡系数 void coefficient of reactivity
反应堆内某给定部位的空泡份额变化1%所引起的反应性变化。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧