时间：2025-05-23 15:57
地点：绥芬河市
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To simplify the expression 2/1 + 5/4 - 2/1 + 5/4, we need to find a common denominator for all four fractions before adding or subtracting them. The common denominator for 2/1 and 2/1 is 1, since both fractions already have the same denominator. The common denominator for 5/4 and 5/4 is 4, since both fractions already have the same denominator. Therefore, the simplified expression is: 2/1 + 5/4 - 2/1 + 5/4 = (2 + 5)/1 + (5 + 5)/4 = 7/1 + 10/4 = 7 + 10/4 = (7*4 + 10)/4 = (28 + 10)/4 = 38/4 = 19/2
4.坚持药物治疗：胆道穿刺置管引流术后，一些患者还需要接受抗生素、止痛药等药物治疗，应记得按医嘱规律服用。
从需求端看，黄金作为最佳的避险资产之一，预计需求明年仍会继续提升。
初级会计职称相当于事业编几级
板栗和它相比，要小很多。
该车支持对外放电，野营必不可少。
在安庆市行政区域内工作的全日制大专及以上学历的毕业生，申请住房公积金贷款购买住房，符合安庆市住房公积金贷款相关政策规定的，最高贷款额度增加10万元。
灰色的鲨鱼用英文怎么说？
The grey shark.