问题
选择题
If you have a job. ______ yourself to it, and you'll finally make it.[ ]
A. devoting
B. to devote
C. devote
D. devoted
答案
答案:C
If you have a job. ______ yourself to it, and you'll finally make it.[ ]
A. devoting
B. to devote
C. devote
D. devoted
答案:C
当今洗衣机的使用十分普遍,它把人们从手工洗衣这一繁琐的家务中解放了出来.
(1)比较甲、乙两图中所示的做法,你认为哪一种做法更安全?为什么?
(2)下表为某型号的洗衣机所用电动机的有关数据:
名称 | 额定电压/V | 频率/Hz | 工作电流/A | 电阻/Ω |
洗涤电动机 | 220 | 50 | 0.5 | 20 |
脱水电动机 | 220 | 50 | 0.8 | 18 |