妊娠图中最主要的曲线为（）。
A.宫底高度
B.血压
C.尿蛋白
D.体重
E.腹围
参考答案：A
I regret ___ harder in the past two years.
A．not having studied
B．having studied
C．having not studied
D．not being studied
号称江西矿产的“五朵金花”是指（）
A.铜、银、金、钽、铀
B.铋、铍、叶蜡石、海泡石、铜
C.钨、铯、钪、碲、石英粉
D.铜、钨、钽铌、铀和稀土
