正常成人白细胞计数中淋巴细胞的百分比是（）
A.1%～5%
B.3％～8%
C.10%～20%
D.20%～40%
E.50％～70%
参考答案：D
They were determined to carry out the plan at first, but then we ________ persuade them to change their minds.[ ]
A．would
B．could
C．were able to
D．had to
转载机减速器外壳过热的原因是什么？
