在一个招聘会上，曾出现这样一幕：一个五十多岁老人在各个摊位前忙个不停，填了六十多份求职应聘表，并且不断向招聘单位咨询。许多人以为她是来找工作的，一打听才知道，她所做的一切都是为了26岁的儿子。此时此刻，她的儿子正在家“赋闲”。他害怕求职碰壁，不敢来应聘。他一天到晚除了吃饭睡觉，就是聊天、玩牌、上网。什么也不干，什么也不管。

已知$a=\frac{1}{\sqrt{3}+\sqrt{2}},b=\frac{1}{\sqrt{3}-\sqrt{2}}$则a,b的等差中项为（   ）

    Do you know the UK government has____(successful) passed a law banning branding on packs of cigarettes? That means tobacco manufacturers will be forced____(pack) their cigarettes in plain packets.

    The motivation behind this____(decide) is to make smoking less appealing to people, especially children.

    A similar law____was passed in Australia in 2012 has resulted____a fall in smoking rates from 15.1% to 12.8% for people aged 14.

    As of January 2015, 22% of adult men and 17% of adult women smoke in Great Britain. The possibility of smoking in the UK increases with age so that by 15 years of age 8% of school children____(be) regular smokers. Children, it is thought, will be less attracted to cigarettes____(sell) in unbranded boxes.

    Smoking is one of____biggest causes of preventable deaths in England. Every year about 80,000 die and over 450,000____(send) to hospital due to smoking. This places a large strain on the health service and is also a factor in why the government would like to prevent people from____(take) up smoking or help them quit.