下列各选项正确的是（）．<br>A:若<img src="/Image1/53/53e03ce936476e93e0dd69a042390c13.jpg" />和<img src="/Image1/53/53e03ce936476e93e0dd69a042390c13.jpg" />都收敛，则<img src="/Image1/77/7744b163087f8cbec9e67a8aad5cc888.jpg" />收敛<br>B:若收<img src="/Image1/d6/d6c32ad4a295b1bf5bf7864f58f2933a.jpg" />敛，则<img src="/Image1/eb/eb671f36196a7d03483d1223ce3b8dc0.jpg" />都收敛<br>C:若正项级数发散，则<img src="/Image1/fb/fbbc6e561861ea3217aa414b1fbc9094.jpg" /><br>D:若级数收敛，且u≥v（n=1，2，..），则级数也收敛