实验设计的严密性、操作的规范性等都很重要，每一个环节都会影响实验结果．

材料一：余相信美国之政策意在支持自由之民族以抵抗少数武装分子或外来压力之征服企图。

──杜鲁门致国会咨文

材料二：美国应该尽力协助世界回复至经济健全的常态……美国政府能够尽力缓和局势，协助欧洲走上复兴道路。

──马歇尔在哈佛大学的演说

材料三：本公约各缔约国……决定联合一切力量，进行集体防御。

──《北大西洋公约》

请回答：

下列句子中没有语病的一项是（     ）

阅读理解

    Please sit down and enjoy your meal. Just don't talk about it.

    These are the requirements at a popular dining party that is known as "silent dinners". It encourages people who take part in the dining party not to speak for one to two hours and not to use electronic devices. Instead, the idea is to just on the food.

    "Silent dinner parties are fast growing," said Honi Ryan, who has hosted 32 silent dinner parties in 11 cities across eight countries, including Germany, Australia andthe United States. "The way we communicate is changing so fast that we need to stop and think about it."

    According to a 2013 nation wide survey, restaurant noise came in second only to poor service among customer（顾客） complaints. And 19 percent of diners who took part in the survey said noise and crowds disturbed them most while eating out.

    Though silent dinners may seem curious, the idea is not a new one. Yogis（瑜伽信徒） have long enjoyed silent meals as part of a deepened practice. In fact, it was a trip to a temple（寺庙） in India by a man that encouraged one Brooklyn restaurant recently to add a silent dinner to its event programming.

    "We'll make a small speech at the beginning of the meal to make sure everyone understands what is happening and ask them not to speak or use their mobile phones for at least an hour," said EAT Green point owner Jordan Colon. And background music will be turned off, too.

    "It's funny; when I first opened EAT, I didn't play music for some time and people had very different reactions（反映） to that," said Colon. "Some people who come out to eat are ready to party, but it was so quiet without music. But I wanted to create an environment that makes you relaxed."

    Although personal reactions to a silent dinner may be various, in general they are more likely to get into a lot of talk afterwards, said Ryan. "At the end of the night people always have a lot to say about silence. But the most reaction is that there is always a good laugh."