电离辐射的防护分为外照射防护和内照射防护。内照射防护的基本防护方法有 ( )、除污保洁和个人防护等综合性防护措施。
A.时间防护B.围封隔离C.距离防护D.屏蔽防护
参考答案:B
阴囊壁的组成为()
A.最表层为皮肤,最内层为睾丸固有鞘膜壁层,中间为平滑肌和筋膜
B.皮肤、皮下组织、肉膜
C.皮肤、皮下组织、肉膜、睾丸鞘膜壁层
D.皮肤、皮下组织、肉膜、睾丸鞘膜壁层、睾丸鞘膜脏层
E.以上均错
.I really don’t know _______I kept the secret papers.
A.where was it
B.it was where that
C.where it was that
D.where was it that