在△ABC 中,BC=9,AB 的垂直平分线交BC 与点M,AC的垂直平分线交BC于点N,则△AMN的周长=( ).
9
To our relief, clothes and blankets have been _______among the people in that earthquake stricken area.
A.distributed
B.separated
C.contributed
D.donated
下列有关捻转补泻中补法的叙述,错误的是()。
A.捻转角度小
B.用力重
C.频率慢
D.操作时间短
E.拇指向前,食指向后(左转用力为主)