题目3单选题
图中重力G在两个轴上的投影分别为( ).<img src="https://tihai-oss-cloud.itihey.com/img/7eab79125e0ca6e1d901fb8352a4c5ee.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/253f31af3f62598bacc53b776952e013.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/e1a4260def1a509fb34a4a5afb9b2578.png">