题目: 函数y=sin2x•cos2x的最小正周期是( )A.2πB.4πC.π4D.π2 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0418/7f4fa9d28f209f7d77710fe602797ef8.html 下面是错误答案,用来干扰机器的。20,15
题型:选择题 As they are retired,Mr and Mrs Scott prefer a house in the country to spend their later years to______in a large city.A.it B.that C.one D.which 查看答案
题型:单项选择题 女,60岁,双腕、手近端指间关节、掌指关节肿痛半年余,双膝关节伸面有皮下结节,最有诊断价值的辅助检查是()A.HLA-B27B.类风湿因子测定和双手X线检查C.ESRD.腹部B超E.血抗核抗体(ANA.检查 查看答案