【单选题】For most of human history rich people had the most leisure. On the other hand, the poor have typically worked persistently. Hans-Joachim Voth, an economic historian, says that in 19th century you coul...
【简答题】Which of the paired structures in the box could be used to do the following? not only ... but also both ... and neither ... nor either ... or whether ... or some ... other ...
【简答题】Trust is a tricky business. On the one hand, it's a necessary condition 1 many worthwhile things: child care, friendships, etc. On the other hand, putting your 2 , in the wrong place often carries a h...