—Don't listen to music in class again, Mike. —______.
A：No, I don't
B：Don't worry
C：I don't know
D：Sorry, I won't
— Mr. Smith. He is one of _______teachers in our school.
经验告诉我们，用盐水漱口，可清洁口腔，预防咽喉炎．其生物学原理是（ ）
用0.618法选取试点过程中，如果试验区间为3，6，第一个试点比第二个试点好，则第三个试点应在 ____ 处．
