距前正中线旁开6寸的腧穴是:()
A.云门
B.天池
C.不容
D.俞府
E.大横
参考答案:A
已知函数f(x)=(x3-6x2+3x+t)ex,t∈R。
(Ⅰ)若函数y=f(x)依次在x=a,x=b,x=c(a<b<c)处取极值,求t的取值范围;
(Ⅱ)若存在实数t∈[0,2],使对任意的x∈[1,m],不等式f(x)≤x恒成立,求正整数m的最大值。
It is to read the books our teacher recommended , for they are well _____ reading.
A.worthy ; worthwhile
B.worth ; worthwhile
C.worthwhile ; worthy
D.worthwhile ; worth