醋酸纤维薄膜电泳时,位于β区带的血浆蛋白质有()
A.TRF
B.LDL
C.β-MG
D.C3
E.IgG
参考答案:A, B, C, D
润滑油料粘度偏大,则应()。
A.增大该侧线馏出量
B.减少该侧线馏出量
C.减少各中段回流量
D.提高该侧线馏出温度
Neglecting friction, you desire to life a 300 kgs weight with a stress on the hauling part of 100kgs.Which of the following tackles would you use ?().
A.Gun tackle
B.Luff tackle
C.Toe-fold tackle
D.Double-luff tackle