棒状小体(Weibel-Palade小体)是下列哪些物质产生的场所()
A.Vwf
B.t-PA
C.proteinc
D.AT
E.肌球蛋白
参考答案:A, B
— I haven't seen Mary for several days, is she ill?
— _____. Her mother told me that she was in hospital.
A. I'm afraid so
B. I hope not
C. I don't expect
D. I'm afraid not
( )是合同约定的、债权人所享有的通过占有由债务人或第三人移交的担保物而使其债权优先受偿的权利。
A.抵押
B.留置
C.质押
D.定金