某居民6.8买入1000美元，以7.0卖出，则收益率为（ ）%，赚（ ）元。 A: 2.94；200 B: 2.94；300 C: 2.857；325 D: 2.857；225

设[tex=5.286x2.857]0LqXJi6w0Y64nguJPN4+grhtAFHzd8TPCaBAcLtfBQI95DAZW7EMyI+7Ar5kORiwPP/7HAdoHPFCpfK1rkYfgg==[/tex]，则[tex=2.357x1.286]F20DA9b5PZyvxJH27l4LOQ==[/tex]是[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]的( )(A)可去间断点(B)跳跃间断点(C)第二类间断点(D)连续点

下列广义积分中发散的是（  ）. 未知类型：{'options': ['[tex=5.286x2.857]4PJc50wvSAt8o8ZItOTjoFUz0Sv6o1psQ5g9Dg+0X3+cdijUlIGEOVlva5Up8phW[/tex]', '[tex=5.143x2.857]4PJc50wvSAt8o8ZItOTjoJQEVccWsVi5+t/sxv9n5cy7lzo322k4Wl/ocOliy50Vc+XEJMnzmo6FGvEB6gPsvg==[/tex]', '[tex=5.5x2.714]qN8fOJEmxCPwE8y3sw7Sczlwgm8Vi597JsWussoZ5TcaNOYTLgKPvgnpC6JFeSIy[/tex]', '[tex=5.643x2.714]PJkWCDHq0HBl1uIZQZIQaORDivGL5ZJzmZMANywbDDJ8zOST4RzRm7KYSJHvOh/f[/tex]'], 'type': 102}

下列广义积分中发散的是（  ）. 未知类型：{'options': ['[tex=5.286x2.857]4PJc50wvSAt8o8ZItOTjoFUz0Sv6o1psQ5g9Dg+0X3+cdijUlIGEOVlva5Up8phW[/tex]', '[tex=5.143x2.857]4PJc50wvSAt8o8ZItOTjoJQEVccWsVi5+t/sxv9n5cy7lzo322k4Wl/ocOliy50Vc+XEJMnzmo6FGvEB6gPsvg==[/tex]', '[tex=5.5x2.714]qN8fOJEmxCPwE8y3sw7Sczlwgm8Vi597JsWussoZ5TcaNOYTLgKPvgnpC6JFeSIy[/tex]', '[tex=5.643x2.714]PJkWCDHq0HBl1uIZQZIQaORDivGL5ZJzmZMANywbDDJ8zOST4RzRm7KYSJHvOh/f[/tex]'], 'type': 102}

下列广义积分中发散的是（  ）. 未知类型：{'options': ['[tex=5.286x2.857]4PJc50wvSAt8o8ZItOTjoFUz0Sv6o1psQ5g9Dg+0X3+cdijUlIGEOVlva5Up8phW[/tex]', '[tex=5.143x2.857]4PJc50wvSAt8o8ZItOTjoJQEVccWsVi5+t/sxv9n5cy7lzo322k4Wl/ocOliy50Vc+XEJMnzmo6FGvEB6gPsvg==[/tex]', '[tex=5.5x2.714]qN8fOJEmxCPwE8y3sw7Sczlwgm8Vi597JsWussoZ5TcaNOYTLgKPvgnpC6JFeSIy[/tex]', '[tex=5.643x2.714]PJkWCDHq0HBl1uIZQZIQaORDivGL5ZJzmZMANywbDDJ8zOST4RzRm7KYSJHvOh/f[/tex]'], 'type': 102}

下列广义积分中发散的是（  ）. 未知类型：{'options': ['[tex=5.286x2.857]4PJc50wvSAt8o8ZItOTjoFUz0Sv6o1psQ5g9Dg+0X3+cdijUlIGEOVlva5Up8phW[/tex]', '[tex=5.143x2.857]4PJc50wvSAt8o8ZItOTjoJQEVccWsVi5+t/sxv9n5cy7lzo322k4Wl/ocOliy50Vc+XEJMnzmo6FGvEB6gPsvg==[/tex]', '[tex=5.5x2.714]qN8fOJEmxCPwE8y3sw7Sczlwgm8Vi597JsWussoZ5TcaNOYTLgKPvgnpC6JFeSIy[/tex]', '[tex=5.643x2.714]PJkWCDHq0HBl1uIZQZIQaORDivGL5ZJzmZMANywbDDJ8zOST4RzRm7KYSJHvOh/f[/tex]'], 'type': 102}

下列广义积分中发散的是[input=type:blank,size:4][/input] 未知类型：{'options': ['[tex=5.286x2.857]4PJc50wvSAt8o8ZItOTjoFUz0Sv6o1psQ5g9Dg+0X3+cdijUlIGEOVlva5Up8phW[/tex]', '[tex=6.5x2.857]4PJc50wvSAt8o8ZItOTjoJQEVccWsVi5+t/sxv9n5cy7lzo322k4Wl/ocOliy50VOx/pPujux4COQZRQ+AdpOcICvSKYvaHxbYfQ55f+8yA=[/tex]', '[tex=5.5x2.714]qN8fOJEmxCPwE8y3sw7Sczlwgm8Vi597JsWussoZ5TcaNOYTLgKPvgnpC6JFeSIy[/tex]', '[tex=5.643x2.714]PJkWCDHq0HBl1uIZQZIQaCJeYEBINEa3r1jVRLOCV3RyJO+NVnFgv89X7E0IjeRx3qe/E/rBot0rkblQrxinWg==[/tex]'], 'type': 102}

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}

以下谓词蕴含式正确的是（）: (∀x) (A(x)→B(x))=>( ∀x)A(x)→(∀x)B(x)|(∀x) (A(x)↔B(x))=>( ∀x)A(x)↔(∀x)B(x)|(∀x)A(x)∨(∀x)B(x)=>( ∀x) (A(x)∨B(x))|(∃x) (A(x)∧B(x))=>(∃x)A(x)∧(∃x)B(x)

以下谓词蕴含式正确的是（）: (?x) (A(x)→B(x))=>( ?x)A(x)→(?x)B(x)|(?x) (A(x)?B(x))=>( ?x)A(x)?(?x)B(x)|(?x)A(x)∨(?x)B(x)=>( ?x) (A(x)∨B(x))|(?x) (A(x)∧B(x))=>(?x)A(x)∧(?x)B(x)