| Ironically, in the United States, a
country of immigrants, prejudice and discrimination continue to be serious
problems. There was often (1) between each established
group of (2) and each succeeding group. As each group became
(3) financially successful, and more powerful, they
(4) newcomers from full participation in the society.
Prejudice and discrimination are (5) U.S. history,
(6) , this prejudicial treatment of different groups is
(7) more unjust than with black Americans. Blacks had distinct (8) . For the most part, they came to the "land of opportunity" as slaves and were not free to keep their (9) and cultural traditions. (10) most European immigrants, blacks did not have the protection of a support group; sometimes slave owners separated members of (11) A. intention B. enforcement C. tendency D. tension [简答题]简述幼儿概念学习的特点。
[单项选择]用相同数目的葡萄糖分子替代浸浴液中的Na+后，神经纤维动作电位的幅度将
A. 逐渐增大 B. 逐渐减小 C. 基本不变 D. 先增大后减小 [判断题]自动导引车能够自动的进行充电操作。
[多选题]在发生人身伤害事故时，为了抢救受伤人员，可以不经许可，即行断开有关设备的电源或( )等介质动力源。
A.油 B.水 C.气 [多选题]通航桥梁应按照《铁路安全管理条例》相关规定，做好桥区航标中的（）的检查维护。
A.桥梁航标 B.桥柱标 C.桥梁水尺标 D.桥梁标 [单项选择]
患者，女，59岁，高血压史10年，临床：全口牙龈边缘及牙龈乳头充血水肿，牙龈增生覆盖全牙冠的1／3～1／2，PD4～7mm，前牙出现松动移位。 该患者的治疗计划，哪一项最准确（）A. 牙周洁治刮治 B. 定期更换降压药 C. 口腔卫生宣教定期复查 D. 必要时，可作牙周手术 E. A+B+C+D [判断题]同一项任务中，不应同时段采用中央遥控和站控（含就地）两种操作方式进行操作或发令。
A.正确 B.错误 [单选题]绿色轨道区段，绿色向左箭头表示（）
A.下行正向标准进路 B.上行正向标准进路 C.上行反向标准进路 D.下行反向标准进路 [单选题]IN谓词可以选取出NULL数据吗
A.能 B.不能 [单选题]460．岛素治疗过程中应告知病人警惕出现下列哪种情况
A.低血糖 B.过敏反应 C.酮症反应 D.肾功能损害 E.胃肠道反应 [单项选择]轴向拉伸或压缩杆件，与横截面成（）的截面上切应力最大。
A. 45º B. 90º C. 30º D. 60º [单选题]浪涌保护器又叫（）。
A.A、熔断器 B.B、断路器 C.C、避雷器 D.D、继电器 我来回答: 提交
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