问题
不定项选择
下列说法正确的是[ ]
是α衰变方程
是核聚变反应方程
是核裂变反应方程
是原子核的人工转变方程
答案
BD
下列说法正确的是[ ]
是α衰变方程
是核聚变反应方程
是核裂变反应方程
是原子核的人工转变方程
BD
阅读短文,用方框内所给单词的适当形式填空,使短文意思通顺,完整.请将答案写在短文后相应题号的横线上.注意:1.每个单词只能用一次;2.每空限填一词,有些词需要做相应的变化;3.其中有两个多余选项。
Scientists have found that monkeys like to use one of their hands more than the other----but it can be either hand. There are as many right-handed monkeys as the left -handed___76___. Next time you visit the zoo and do watch the monkeys__77__. You’ll see that some of them will use their right hands and others will use their left hands. But men use their right hands better and this ___78___life difficult for the left-handed ones. We live in a right-handed world. Some scientists have found out that more of __79__people are left-handed, but they don’t know why. But they are _80_hard to discover the secret. 小题1:___ 小题2: ____ 小题3: ____小题4: ____ 小题5: _____ 小题6:____小题7: _____小题8: ____小题9: _____小题10:______ |