凝血酶的受体是（）
A.GPⅠa／GPⅡa复合物
B.GPⅠb/GPⅨ复合物
C.GPⅡb／GPⅢa复合物
D.GPV
E.GPⅣ
参考答案：D
Much of this success is the work of students, and the support from teachers.[ ]
A. because, of
B. because of, with
C. because of, within
一电动机的起动电流为20A，其起动阻抗应为( )。
A．23Ω B．30Ω C．11Ω D．15Ω
