结肠癌最早出现的症状是
A.腹痛B.排便习惯及粪便性状改变C.腹部肿块D.全身症状E.肠梗阻
参考答案:B
I'll give it to Jim as soon as I_______him tomorrow.
A. saw
B. will see
C. see
D. have seen
光缆在敷设前还应进行()。
A.型号检查
B.外观检查
C.光纤导通检查
D.检测试验
E.合格证检查