[tex=21.929x1.286]8cqux6lz+do4Jttr1V0089lkhRPpaRyptC6H45KCwqO55cJh0lPzUNyvH+Nb9I5Ywe4iyyAfaeKNVnkz0OQS+IdCshg9xPeAu3cGexUujfM=[/tex][img=312x266]179827bbd4e8418.png[/img]

下列选项为某变速器一、二、三、四挡的传动比，则三挡的传动比为（）。 A: 0.969 B: 1.286 C: 1.944 D: 3.455

[tex=22.286x1.286]Hgd17yGnmVnYjmupChcbA2KlMCtXbHirrEq6Gr0AfV590DnhfZQXLLSoAqChlRn5F2XOO1Imjbk71R/+OPzhIv1TEj3KjHYUOzmglbfMYhE=[/tex][tex=14.786x1.286]sGZwL+bwkGVuoyIkgrV0+tb38rvhXKCcqoMJ4XStVfdydcMbAQd2avCNKlYivD7OxeKPDepSwPVnlKXN6fsoHQ==[/tex][tex=8.857x1.286]Y2in6xakENaVp9BNvoctVnf6TjYDDY34pATL0LXr/6iDGQD1kCr0dBpGmvU0G8E8[/tex][tex=21.929x1.286]F02zVsyzWQvyIVYFIz+t7m0blix8Y8WeBvDoaH18kdGUMSm534l7POgUforyLutT5Nt0nxzfM4qFs6CNg5x4RsTIZx5YkibRJOVIx6jTmJ4=[/tex][tex=10.786x1.286]a/sCuZXtSVz+YhMIsXQnAO4r703z7P8g6MaQLpqz+cV1j2owI8AQB84Y53CZd7GG[/tex]

[tex=22.286x1.286]Hgd17yGnmVnYjmupChcbA2KlMCtXbHirrEq6Gr0AfV590DnhfZQXLLSoAqChlRn5F2XOO1Imjbk71R/+OPzhIv1TEj3KjHYUOzmglbfMYhE=[/tex][tex=14.786x1.286]sGZwL+bwkGVuoyIkgrV0+tb38rvhXKCcqoMJ4XStVfdydcMbAQd2avCNKlYivD7OxeKPDepSwPVnlKXN6fsoHQ==[/tex][tex=8.857x1.286]Y2in6xakENaVp9BNvoctVnf6TjYDDY34pATL0LXr/6iDGQD1kCr0dBpGmvU0G8E8[/tex][tex=21.929x1.286]F02zVsyzWQvyIVYFIz+t7m0blix8Y8WeBvDoaH18kdGUMSm534l7POgUforyLutT5Nt0nxzfM4qFs6CNg5x4RsTIZx5YkibRJOVIx6jTmJ4=[/tex][tex=10.786x1.286]a/sCuZXtSVz+YhMIsXQnAO4r703z7P8g6MaQLpqz+cV1j2owI8AQB84Y53CZd7GG[/tex]

测定某样品中的含简量，六次平行测定的结果是[tex=21.929x1.286]eh9hucXiLTtxnGou0pm7/BXAQOB32Mc0tu+fA6tc9zXtBm8cOtUQX2d7Q56NkSm9XTwmRMAvW3Rl9wZhDyBetQ==[/tex]。计算这组数据的平均值、平均偏差、标准偏差。[tex=10.643x1.286]vpZePfsnWLpVcIvXUakyh62dgoaqeG0JC3+bfamjeVY=[/tex]

下列哪些集合是空集:[tex=7.071x1.357]1vqtJ9KmyJWyjOuIo8P8Yw+AS/dse7nJJhQkjKHfF9s=[/tex],[tex=10.286x1.571]qd2fo4rpu8rAGVaUKM28evh6Ot86NwCHUVWCaS67XizFOWXAmNU/OzarTi1ZyIpb[/tex],[tex=10.0x1.286]B0pCHr8zCsbgNIKMqyt6afKxW3cxXaSTmxhLvaOfYj8=[/tex],[tex=10.071x1.286]k5kvdkUMU8rJfJSg4XrZN+UnFayPYZsB+VKIdGLBSj0=[/tex],[tex=21.929x1.286]bLjL+w5rcGIf7NPSpMEWAQB8nR+Olgm/pDnu4POf8JHjcJWyLPDCQcH93D5nSk+WQtyYLLP0n449bWiXgjVOKbHuG5Z3yziA98R1STsLWiE=[/tex]

[tex=21.929x1.286]JfSVAGuJ/keAXVoQTfSeFrTUbezfP1G5/UDV3E89VMVc0eVQ/KW9RpImO3wK1OiEyazuVOi5RMGFAAWDDhoqnIWZ+D7VdsazEOGAKPbYeSY=[/tex] 未知类型：{'options': ['[tex=5.286x1.286]21M/fhXeA9/YBhqAaKuROTMrLQQWoRcEsPf2wEE+Pqs=[/tex]', '[tex=6.929x1.286]gATFBQhP2gSFYEJuqTv7ktfeXc5ZyRS7nm2sbOq6SfRDUjx511Md15MbMaWEDBxV[/tex]', '[tex=4.143x2.0]TGBtQvTXRlAX+I4GSeZR7oyKj//kELPgNF1Eq+TSsFY=[/tex]', '[tex=8.429x1.286]+pnCoMlR+PpX0dsmauyxrDZd+pSqu+Yw/lAyCPVSkbwvEfTF4uYAA3pmqLpU22lx[/tex]'], 'type': 102}

器官移植前为慎重选择供者需要做的特殊检查是 未知类型：{'options': ['[tex=6.214x1.286]fzV//s/Fc4ATO8y28lcO1EVKr5/Hoh0XtuaWN6ZVPC8=[/tex]', '淋巴细胞毒交叉配合试验', '[tex=21.929x1.286]2cMJYp6BWv1P4lChOaOPWVzDM0vrOW7eBRhkHFiJ7daZZJ3uhubmLveWl4shxFRxMgf8UP8Kw55ePH6BMQHhfw==[/tex]', '自身抗体检测', '[tex=4.214x1.286]eiWNOJJ7USNQJTxO+en8mA==[/tex]'], 'type': 102}

已知 [tex=21.929x1.286]SQR8onTDdFDCrkjza2dBVw+JsHnAryoin0NRhhTu23f8KKZsK3mtAu05y7gZHdnUWLromokR22YSh23LFlaZIkbtCHGUnNOA2uzMp2+rtxc=[/tex]。 求力系向点 [tex=0.786x1.0]5SeCOJOzMwSNbX8MGx2Qsg==[/tex] 的简化结果，并求力系合力的天小及其与原点[tex=0.786x1.0]5SeCOJOzMwSNbX8MGx2Qsg==[/tex] 的距离 [tex=0.571x1.0]TcM6B5Wrs5vy9dWrxRPSdg==[/tex].[br][/br][img=607x266]17963b32d3c9f7c.png[/img]

下列变量组（）是一个闭回路。 A: {x，x，x，x，x，x} B: {x，x，x，x，x} C: {x，x，x，x，x，x} D: {x，x，x，x，x，x}