填空题--Do you like there shoes?
--No, show me _____.
填空题_____ his boyhood, he was slow in learning to read and write.
填空题不停电工作系指：1）工作本身不需要停电并且不可能触及（ ）的危险；2）许可在带电设备外壳上或（ ）上进行的工作。
填空题Scientists have spent years _____ into the effects of certain chemicals on the human brain with no result.
填空题直线杆又叫中间杆，一般比较轻便，机械强度较低。在输电线路上，处在直线上，没有转角，因为在塔上挂的是________金具，所以也叫________塔。