围海造地、码头、堤坝、围堰、储灰场等填海型项目用海面积多少以下，由省人民政府审批？
参考答案：
50公顷。
“You’ll have to wait for two hours, ________ is, at about 11:30, ________ the medical report will come out.” the doctor said to me. [ ]
A. that; when
B. which; that
C. that; which
D. it; whose
急慢性血栓的主要区别是（）。
A.实性回声
B.血流信号消失或减少
C.管腔不能压瘪
D.血栓回声强弱和管腔有无扩张
E.以上均不是
