临床诊断乳癌的首选检查方法是
A.B超B.红外线扫描C.热图像D. * * 溢液涂片E.乳腺腺管造影术
参考答案:A
On account of the development of the economy, the environment is seriously polluted and we must
________ the emission of the carbon dioxide.[ ]
A. cut in
B. cut off
C. cut up
D. cut down
以下哪项属于有效投标()。
A.资格预审后,联合体增减人员
B.投标人逾期送达的投标文件
C.投标人未提交投标保证金的投标
D.投标文件加盖公章并密封严实