【单选题】
Did Tom tell you to water the flowers?
【单选题】
I __________ an interesting news item in yesterday’s Times.
【单选题】
Many Americans worry about leisure and hurry from one activity to the next, __________ little time to stop and think.
【单选题】
Sorry to interrupt, but can you give me another copy of the handout?
④
By no means, but it’s impossible
【判断题】
∫1/1+x^2 dx=arctanx
【单选题】
不定积分∫1/(1+x2)d(x2)=( )
【判断题】
f(x)=(x^2-1)/(x-1),g(x)=x+1;f(x)=g(x)