When people engage in activities that help others, their brain releases endorphins, the brain’s natural opiates, which induce in people a feeling of well-being. It has been suggested that regular release of endorphins increases people’s longevity. And a statistic on adults who regularly engage in volunteer work helping others shows that they live longer, on average, than adults who do not volunteer. However, that statistic would be what we would expect even if volunteering does not boost longevity, because___________ Which of the following most logically completes the argument? A In the communities studied, women were much more likely to do regular volunteer work than men were, and women tend to live longer than men do B The number of young adults who do regular volunteer work is on the increase C The feelings of well-being induced by endorphins can, at least for a time, mask the symptoms of various conditions and diseases, provided the symptoms are mild D It is rare for a person to keep up a regular schedule of volunteer work throughout his or her life E Some people find that keeping a commitment to do regular volunteer work becomes a source of stress in their lives 错选了C，答案给的A。A说女士比男士更可能做志愿活动，女士比男士活得长。这不是支持原文了么？可以题目不是应该驳斥吗？

请数学老师解答 谢谢

请数学老师解答，谢谢

请数学老师解答 谢谢

请数学老师解答 谢谢

一家餐厅有A B两个list的side dishes，两个list都不重样，给出一共有18种搭配方式，问B list里有几个菜 条件1：AB一共有11个菜 条件2：A有2个菜 请数学老师解答 谢谢老师

一个圆内接长方形，问长方形周长是多少？ 条件1：圆半径为2； 条件2：长方形的一条边是2 请数学老师讲解，谢谢老师

请问下金老师，先通过主谓一致排除a，通过in doing sth “在哪方面干什么”意思不对排除ce，剩下bd怎么选择呢？感觉时态没法做选择，前面一个用using 一个用by the use of …使用过动词优于名词来最后选择b吗？

想请问Tina老师，这个题通过后面画线部分比较选项可以排出ad，cwith结构修饰主句主谓关系不恰当排除c，同位语be中summarize前面那群borrowers更好，但是be比较，我觉得e更好，因为that感觉又是引导一个如records这个名词的同位语解释说明什么样的一个热cords，但是答案选b，该怎么权衡呢？

请老师完整解答一下这道题解题思路，我选的A，认为后面是一个介词短语修饰语。

王文静老师你好，就这道题目，我特地查了字典，with可以表示一件事情的factor和这件事情的关系的，换句话说，C选项我读到with，我第一反应就是自动就理解为后面的两个条件（factor）是导致output tripled的原因，所以认为这句话即处理了因果关系也表达了两个factor之前的并列关系。麻烦老师指出我的语法理解问题