以下哪一项CT表现,提示直肠癌失去手术机会()
A.肿块外缘毛糙
B.直肠全周受累
C.直肠周围脂肪内肿大淋巴结
D.直肠周围筋膜增厚
E.直肠周围脂肪密度增高
参考答案:D
The boy was very sick, but he managed to ______.
A.pull off
B.pull out
C.pull through
D.pull up
紫外线对眼睛的损害是最大的尤其波长在()损害更大。
A.0.32μm以下
B.0.32μm以上
C.0.4μm
D.0.5μm