设函数y＝f（x）由参数方程确定，则（　　）。

A A．f（x）是奇函数，g（x）是奇函数 B B．f（x）是奇函数，g（x）是偶函数 C C．f（x）是偶函数，g（x）是偶函数 D D．f（x）是偶函数，g（x）是奇函数

A A．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497227_0.png">连续，f（x，y）可微 B B．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497227_0_1.png">连续，f（x，y）不可微 C C．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497227_0_2.png">不连续，f（x，y）可微 D D．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497227_0_3.png">不连续，f（x，y）不可微

A A．3 B B．2 C C．1 D D．0

A A．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497226_0.png">发散 B B．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497226_0_1.png">发散 C C．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497226_0_2.png">发散 D D．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497226_0_3.png">发散

A A．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497228_0_1.png"> B B．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497228_0_2.png"> C C．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497228_0_3.png"> D D．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497228_0_4.png">

A A．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497230_0.png"> B B．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497230_0_2.png"> C C．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497230_0_3.png"> D D．<img border="0" alt="" src="https://tuku.weimei168.com/uploads/upimg/20241129/22497230_0_4.png">

A A．0 B B．1 C C．2 D D．3

A A．0或1 B B．1或3 C C．2或3 D D．1或2

A A．充分必要条件 B B．充分不必要条件 C C．必要不充分条件 D D．既不充分也不必要条件