女患者,月经每20日-行,量多色淡,小腹空坠隐痛,纳少便溏,诊断为:
A.月经过多
B.月经先期
C.经行腹痛
D.经行泄泻
E.以上均不是
参考答案:B
She said that she would do _______ she could __________ her daughter laugh.
A.what, make
B.that, make
C.what, to make
D.that, to make
(本小题13分)已知数列{an}的前n项和Sn = 2an– 3×2n + 4 (n∈N*)
(1)求数列{an}的通项公式an;(2)设Tn为数列{Sn – 4}的前n项和,试比较Tn与14的大小.