用 while, meanwhile, during填空

1.      _the winter vacation, I came to know how to make coffee.

2. He came to visit me         I was out.

3. He often does his homework before a computer;        he listens to MP3.

以洋地黄类药物控制肺炎合并心力衰竭的用法是（）

A.首次给洋地黄化总量的1／2，余量分2次，每隔4～6小时给予，8～12小时内达到洋地黄化。静注或口服

B.洋地黄化总量等分4份，每日2次，48小时滴注完

C.洋地黄化总量等分2份，每日2次，12小时滴注完

D.洋地黄化总量加10％葡萄糖100ml，静滴，8小时内滴注完

E.洋地黄化总量加10％葡萄糖10ml，缓慢静注