孕妇血压正常而仅有下肢凹陷性水肿的现象说明()
A.属生理现象
B.属病理现象
C.与雌激素的分泌改变有关
D.围产儿死亡率较高
E.围产儿死亡率较低
参考答案:A, C, E
______是知情同意的客观形式,表现为一种文件式的东西。
Helen has got ________ it takes to be a great tennis player. In other words, she has the potential to become world famous.
A.that
B.how
C.when
D.what