【单选题】Summer is winding down, but it's still not too late to put the top down and hit the road. For those of us who can't spring for a Corvette or a BMW, here's some good news: Two of the coolest convertibl...
【简答题】The ship’s generator broke down, and the pumps had to be operated ___ instead of mechanically. A) artificially B) automatically C) manually D) synthetically