题目

69. We stayed in a peaceful village s          by beautiful scenery. 70. Hearing the loud thunder, Lily was t           and dared not go to sleep on her own. 71. First ____________ (印象) are the most important when you make friends with others. 72. He is a respectable professor and every student _________ him. (尊敬) 73. We must learn to be________ (体贴) and care more about others. 74. He always slept in class these days, ___________ (证明)that he had given up his effort. 75. His ___________ (职业) is teaching Chinese in a primary school. 76.Your questi13．如图所示，用水平方向的力F将重为G的木块压在竖直的墙壁上，开始时木块保持静止，下列判断中正确的是（　　）A．当F增大时，摩擦力将增大B．当F减小时，摩擦力一定减小C．当F减小时，摩擦力先不变，后变小D．当F减小为零时，摩擦力不一定为零