常伴发精索静脉曲张
A.肾癌B.肾盂癌C.膀胱癌D.前列腺癌E.睾丸肿瘤
参考答案:A
Sex education is a sensitive area for some parents, and thus it should remain _________.
A.random
B.previous
C.optional
D.vital
结合现实谈谈学校在促进个体发展方面的独特作用。