| What can dogs see The answer to this
question is disappointing; dogs {{U}} (67) {{/U}} see no colors. The
answer is disappointing {{U}} (68) {{/U}} many owners of dogs will
naturally be sorry that their dogs cannot see colors which to them are
beautiful. But then, they may {{U}} (69) {{/U}} that clogs have an
extraordinary {{U}} (70) {{/U}} sense of smell. The dog’s world is
{{U}} (71) {{/U}} in enjoyable smells, {{U}} (72) {{/U}} it may be
colorless. How do we know if dogs are color-blind This has been tested in the same way {{U}} (73) {{/U}} it has been discovered what dogs can hear. The {{U}} (74) {{/U}} has been made to train dogs to salivate (流口水) when they are shown {{U}} (75) {{/U}} different colors. Such experiments have {{U}} (76) {{/U}} failures; it has been found impossible to make dogs {{U}} (77) {{/U}} colors from A. therefore B. however C. meanwhile D. moreover [多项选择]公民应该出示居民身份证证明身份的情形包括有（）等。
A. 兵役登记 B. 常住户口登记项目变更 C. 结婚登记 D. 赡养登记 [判断题]宋体是印刷中常用的字体之一。
[单项选择]某种阀门得型号为H41H－25。其中一个“H”表示（）。
A. 闸阀 B. 安全阀 C. 止回阀 D. 截止阀 [判断题]悬空高处作业人员应挂牢安全带,安全带的选用与佩戴应符合现行国家标准《安全带》(GB6095)的有关规定,安全带应拴在操作人员上方牢固处。
A.正确 B.错误 [单选题]在圆管中，粘性流体的流动是层流还是紊流状态，主要依据于(____)。
A.流体粘性大小 B.流速大小 C.流量大小 D.流动雷诺数的大小 [判断题]面对客户提出的要求，销售顾问应该看情况进行满足
A.正确 B.错误 [单选题]（）通常位于舱门适当位置
A.驾驶员 B.安全员 C.指挥员 D.通讯员 [单项选择]患者男性，25岁。自诉全身不适，腹痛，腹泻，呈水样便，并伴恶心，呕吐，经询问后得知该患者曾于发病前2小时进食新鲜盐渍海带凉拌菜。请问致病菌最有可能是（）
A. 霍乱弧菌 B. 副溶血性弧菌 C. 金黄色葡萄球菌 D. 伤寒沙门菌 E. 痢疾志贺菌 [单项选择]环境卫生学研究
A. 自然环境和生活居住环境与健康的关系 B. 生产环境和生活环境与健康的关系 C. 利用有利环境因素和控制不利环境因素 D. 生活环境和居住环境与健康的关系 E. 控制不利环境因素 [单选题]口腔健康调查时普查的应查率是
A.55%～60% B.65%～70% C.75%～80% D.85%～90% E.>95% [判断题]手动切除交流滤波器（并联电容器）前，应检查系统有足够的备用数量，保证满足当前输送功率无功需求。
A.正确 B.错误 [单选题]4.当用4.d法检验一组数据中的可疑值不能舍去时应.。
A. 错可疑值-错平均值﹥4.d B. |错可疑值-错平均值|4.d C. |错1.-错n-1.|﹥4.d D .错n-1.-错n﹥4.d 我来回答: 提交
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