（）定期对承印厂家的印制质量、服务质量等进行考核。

[单选题]乒乓球横握拍的特点为（）。

[单选题]如何满足物联网建设与发展面临的（）问题，将是决定物联网是否能在大规模范围内得到普及应用的关键问题。

[名词解释题]最小有作用剂量

[单选题]企业进行多元化投资，其目的之一是（）。

[填空题]瓦斯浓度处于爆炸范围内的界限一般认为是（），其中（）是爆炸下限，（）则是爆炸上限。（）是理论上最猛烈的瓦斯爆炸浓度。

[单选题]分压式偏置电路中的栅极电阻Rg一般阻值很大，这是为了（）

[填空题]带电作业工具使用前，用_____及以上绝缘摇表或绝缘检测仪进行_____绝缘检测（电极宽2cm，极间宽2cm），阻值应不低于_____MΩ。

[单选题]我国常规高空探测系统以（）为主。

[单选题]人的行为不是由本能决定，也不单单是外部刺激的结果，而是人的理性评价的结果，这种观点符合（）

[问答题]A friend has written to you asking for information about the sports centre in your school, which you know quite well. Study the letter and the advertisement for the sports centre below, on which you have written some notes. Then write back, answering your friend’s questions and saying whether you think the sports centre would be suitable for him/her or not.　　As I think I mentioned in my last letter, I’d love to spend some time at that new sports centre I come over and stay with you this August. I don’t want to do anything that’s too organized, so no team sports or anything like that, and I’d rather not be surrounded by lots of people all trying to get super-fit or lose lots of kilos as fast as they can. So if you’ve been there, could you let me know whether you think there would be any pleasant, relaxing activities that I would enjoy?　　Looking forward to hearing from you.Best wishesLee　　Write your letter in no less than 100 words in an appropriate style. Do not sign your own name at the end of the letter. Use “Li Ming” instead. Now write your letter on the answer sheet.