一个220伏特的电热器，接110伏特时电流为原有之多少倍（）
A.1/4倍
B.1/2倍
C.不变
D.2倍
参考答案：B
After meeting the beautiful young girl, the young man lay on his bed, wide awake, with wonderful ideas ______ into his mind.
A．crossing
B．entering
C．crowding
D．reaching
凝胶过滤层析
