权力
参考答案：
是指组织中某个人或某个部门影响其他人并得到所期望的结果的能力。
同钢材、混凝土等建筑材料相比，土的抗剪强度有何特点？同一种土其强度值是否为一个定值？为什么？
Hard as a teacher may try, he can’t ______to make all his students make a difference in study, letting alone in life.
A．make sure
B．be sure
C．guarantee
D．insure
dents make a difference in study, letting alone in life.