Which statements are true， given the code new FileOutputStream（"data"， true） for creating an object of class FileOutputStream？（） FileOutputStream has no constructors matching the given arguments.。 An IOExeception will be thrown if a file named "data" already exists.。 An IOExeception will be thrown if a file named "data" does not already exist.。 If a file named "data" exists， its contents will be reset and overwritten.。 If a file named "data" exists， output will be appended to its current contents.。
简述证据制度与诉讼制度的关系。
简述根部病害的危害及特点。
论述学前儿童手工教学需注意的问题。
滤波器按元件种类分为低通滤波器、高通滤波器、带通滤波器、带阻滤波器等。
莫扎特的第一部喜剧杰作是（）
