【单选题】听力原文:Man: Most actors start out with a bit of a regional or non-standard accent of some sort, but what tends to happen is that, at drama school, part of the training is to acquire what's called 'stand...
A.
They need to study a wide variety of accents.
B.
They have to be able to control their use of accents.
【简答题】You’re an yst for Ford. You want to find out if the average miles per gallon of Escorts is less than 32 mpg. Similar models have a standard deviation of 3.8 mpg. You take a sample of 36 Escort...