阅读下面一首唐诗，回答问题。（6分） 梅花落 刘方平 新岁芳梅树，繁花四面同。春风吹渐落，一夜几枝空。 少妇今如此，长城恨不穷。莫将辽海
（1）如图所示，请在图中A点画出阻力F2的示意图并作出动力F1的力臂。 （2）教室里的一个开关能控制两盏正常工作的电灯，请在图中画出其电路图，并
世界上最大的岛屿是 （ ） A.马达加斯加岛 B.格陵兰岛 C.冰岛 D.塔斯马尼亚岛
In my opinion, all Mr Tom ______ good to his students in his class at present. He is very strict in their study. A. does does does B. does do do C. does does do D. did do does
物体由静止开始做匀加速直线运动，在第4s内的平均速度为1.4m/s,则物体的加速度为 A．0.15m/s2 B．0.2.m/s2 C．0.28m/s2
1983年国家有关部门指出，去年国有企业首钢创利润4．1亿：交国家2．862亿元后，在当年新增利润中拿的太多。首钢领导则认为，企业去年上交利润又递
As we all know ,every minute, full use of our lessons ,will do good to our students. A．which makes; studying B．when made; to study
Every possible means _______ to prevent the crash , but the computer doesn’t still work． A．is used B．are used C．has been used
