A.平衡力系
B.一合力
C.一合力偶
D.一合力与一合力偶
[单选题]A.平衡力系B.一合力C.一合力偶D.一合力与一合力偶
[单选题]A.B.C.D.E.以上答案均不正确
[单选题]A.60B.72C.96D.73E.84
[单选题]A.B.C.D.E.以上答案均不正确
[单选题]A.60B.72C.96D.73E.84
[单选题]A.1001111B.0110000C.10110111D.10001001
[单选题]A.-1B.7C.-7D.1
[单选题]A.向右平移B.静止不动C.向外扩张D.向中心收缩
[单选题]A.87.72molB.87.98molC.88.12molD.87.58mol
[单选题]A.能B.不能C.不能确定