用单词的适当形式填空。

1. You can wait for your flight in the d______ lounge.

2. This was his first long t_______by train.

3. They t______to the nearest town for shopping on Saturdays or for church on Sundays.

4. The training programme takes the f______of a series of workshops.

5. H______was your holiday? —Very good.

用惰性电极电解2L饱和氯化钠溶液,经过一段时间以后,电解液的pH上升至13

（Kw=10^-14），则电解过程中两极上 * * 生的气体在标准状况下体积为

A．2.24L　　

B．4.48L

C．1.12L　　

D．11.2L