在宋代常用“灾及梨枣”来讽刺刻印的书没有价值，意思是白白糟蹋了梨枣树木。这表明当时（）
①开始出现雕版印刷品
②毕昇发明的木活字被广泛使用
③较好的雕版材料多用梨木、枣木
④雕版印刷风行
女，29岁，1周来鼻及牙龈出血，皮肤瘀斑。血红蛋白55g/L，白细胞12×109/L，血小板16×109/L。骨髓增生活跃，幼稚细胞占85%，胞浆有大小不等颗粒及成堆棒状小体，过氧化酶染色强阳性。
本患者治疗首选（）| {{B}}Questions 65-71 are based on the
following passage.{{/B}} Questions of education are frequently discussed as if they bore no relation to the social system in which and for which the education is carried on. This is one of the commonest reasons for the unsatisfactoriness of the answers. It is only within a particular social system that a system of education has any meaning. If education today seems to deteriorate, if it seems to become more and more chaotic and meaningless, it is primarily because we have no settled and satisfactory arrangement of society, and because we have both vague and diverse opinions about the kind of society we want. Education is a subject which cannot be discussed in a void: our questions raise other questions, social, economic, financial, political. And the bearings are on more ultimate problems even than these: to know A. the misconception of the genuine role of education B. the lack of a common goal in the education system C. the lack of well-knitted social structures D. the incompetence of educators and society governors [判断题] 涉密人员离开涉密岗位后,就不再对本人在原涉密岗位上知悉的国家秘密事项承担保密义务
A.正确 B.错误 [单选题]多台塔式起重机在同一施工现场交叉作业时.应当有防碰撞的安全措施。使用单位须将安全措施报( )审核.
A.施工总承包 B.监理单位 C.建设单位 D.出租单位 [判断题]起升机构是位能负载其中上升为阻力负载，下降为动力负载。
[填空题]要使竞走时的身体重心在走进中趋于平稳，应从（）、（）、（）等方面考虑。
[单选题]监控中心应能同时接受和处理不少于（）个联网用户的火灾报警信息。
A.1 B.3 C.5 D.10 [多选题]调车作业必须做好下列准备：（）。
A.提前排风、摘管，核对计划，确认进路，检查线路、道岔（集中联锁区除外）、停留车及车辆防溜等情况 B.人力制动机的选闸、试闸，系好安全带 C.准备足够的良好制动铁鞋和防溜器具 D.无线调车灯显设备试验良好 我来回答: 提交
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