血吸虫IHA实验结果为红细胞形成薄层凝集，布满整个孔底，结果应判为（）.
A.“+”
B.“++”
C.“+++”
D.“++++”
参考答案：C
The man is ________ a serious nervous breakdown because he is unable to deal with pressure from daily life.
A．in front of
B．in favor of
C．on behalf of
D．on the edge of
简述转向架各基本部件对来自车辆（货物）上的重力的传递顺序？
