皮皮学，免费搜题
登录
搜题
【单选题】
当两个力同时作用于一个可绕定轴转动的刚体上时,下列说法中正确的是( )A.
若两平行于转轴,则它们对轴的合力矩一定为零
B.
若两垂直于转轴,则它们对轴的合力矩一定为零
C.
若两力的合力为零,则它们对轴的合力矩也一定为零
D.
若两轴的合力矩为零,则它们的合力也一定为零
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】任何单位和个人，不得转借、涂改、损毁、买卖或伪造税务登记证件。（ ）
【单选题】听力原文：The Fourth of July is the Independence Day. It was on July 4, 1776. that the Declaration of independence was signed, proclaiming the independence from England of the thirteen original colonies wh...
A.
The 4th of July is coming at hand.
B.
Independence Day was the day on which Pearl Harbor was bombed.
C.
The 4th of July marks America's freedom from England.
D.
July 4th is President Washington's birthday.
【简答题】我国的国内旅游是伴随着 和 的发展而发展的。
【单选题】-Was the United State of America founded on July 4 th , 1776？ --You _________ be right but I need to check it in the history textbook anyway.
A.
have to
B.
must
C.
may
D.
will
【判断题】Since the date when independence from England was on July 4th, 1776, July 4th is the National Day in the United States of America. _______________
A.
正确
B.
错误
【简答题】On July 4th, 1776, the document called the Declaration of _____ was accepted by the American Congress.
相关题目：