在5×5的方格纸中将图1中的图形N平移后的位置如图2中所示，那么正确的平移方法是：先向（ ）移动（ ）格，再向（ ）移动（ ）格．
下；2；左；1
光在真空中传播的速度是________m/s。声音在空气中传播的速度是________m/s。声纳是利用_________来工作的（填“超声波”或“次声波”）。人的眼球相当于一个_________镜。
根据句意完成已给出首字母或汉语提示的单词，使补全后的句子意思通顺，语法正确。
小题1:Now the students have no lessons on S__________ and Sunday.
小题2:It’s cold in Australia in July. People there wear w_______ clothes.
小题3:Hangzhou has lots of wonderful s__________. West Lake is just one of them.
小题4:Ann kept s_________ all day because his little brother broke her toy bear.
小题5:Bob is six feet in __________(身高)
小题6:It’s good manners to keep your _________(声音) down in public.
小题7:My parents usually __________(花费) lots of money on books.
小题8:—— What’s your biggest _________(问题)?
—— I don’t have enough time to sleep.
