题目

Although he was a child, he tired to find ways ________ people ________ life more.  A. to help ; enjoy B. help ; enjoy C. to help ; enjoying D. help ; enjoying 答案：A1．已知直三棱柱ABC-A1B1C1的各条棱长均为4，M是AB1的中点，连接BM、CM，则三棱锥B-ACM的体积等于（　　）A．$\frac{8}{3}$B．$\frac{{8\sqrt{3}}}{3}$C．$8\sqrt{3}$D．$4\sqrt{3}$