4脸盆水全部倒入桶内能装满3只小水桶，5大杯正好倒满2脸盆。
（1）装满3小桶需几大杯水？
（2）20大杯水能倒满几小桶？
（1）10大杯水；（2）6小桶
--- Do you really think I can achieve my goal ?
--- Absolutely .___ you give up halfway .
A．If
B．Unless
C．Since
D．because
用硅箱控制串灯（40w磨砂灯）怎么接？
