水流因边界的改变而引起断面速分布发生急骤的变化产生的局部阻力而引起的水头损失，称为（），用hj表示。
参考答案：局部水头损失
She had no money to buy a plane ticket and , , she didn’t have the courage to tell her parents her present situation .
A．even worse
B．however
C．otherwise
D．or
治疗气厥虚证，应首选（）。
A.安宫牛黄丸
B.补中益气汤
C.四味回阳饮
D.四君子汤
E.通瘀煎
