A:an+1=bn+1
B:an+1>bn+1
C:an+1<bn+1
D:an+1≥bn+1
because of, succeed in, have a great time, be full of, look forward to
下图是一组用于研究可燃物燃烧条件的对比实验,对有关实验现象和结论的判断错误的是
下列说法,错误的是:
根据句意,用括号内所给单词的适当形式填空(1)A glass is used for ____ (drink) water.(2)What is the most ____ (use) invention in the world?(3)Do you know the ____ (heat) ice cream scoop?(4)This kind of bicycle was____ (invent) by a middle school student.(5)What do you think of these ____ (invent)?