下列哪一项可以诊断为妇人腹痛:
A.每于月经前2天左右小腹疼痛B.妊娠4个月小腹疼痛C.小腹疼痛时作,甚则痛连腰骶D.产后3天小腹疼痛E.以上均不可
参考答案:C
The people there were greatly ___to see everything changed over a night. [ ]
A. pleased
B. shocked
C. interested
D. moved
一般粗粒砂轮的工作效率比细粒砂轮的()。