Doyoumakefriends   61  (easy)?Doawall-sittestandyou’l...

问题详情：

   Do you make friends    61   (easy)? Do a wall-sit test and you’ll find out.

   Researchers at the University of Oxford did   62  study with 101 participants aged between 18 and 34. Participants first   63   (fill) out questionnaires about their social lives, and they were then asked  64 (press)against a wall with their   65   (knee) at right angles(直角)for as long as they could,  66  can be really painful.

   The results showed that the longer participants held the position, the bigger  67  outer network---or distant friends they contacted once or twice a month—was. That was   68  the brain’s painkilling system is associated  __69  both pain tolerance and social bonding, which means that the more active this system is, the  70  (good) you are at both.

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