<p>以下程序的输出结果是：( )<br/> fo = open("text.txt",'w+')<br/> x,y ='this is a test','hello'<br/> fo.write('{}+{}\n'.format(x,y))<br/> print(fo.read())<br/> fo.close</p>
<p> this is a test hello</p>
<p> this is a test</p>
<p> this is a test,hello.</p>
<p> this is a test+hello</p>
