发票的基本栏目内容,一般有购货单位,时间、()计量单位、金额等。
A.字轨号码
B.品名规格
C.联次及用途
D.银行开户帐户
参考答案:B
—Were there any banana trees in your hometown (家乡).
—________. [ ]
A. No, there weren't
B. Yes, there weren't
C. No, there were
D. Yes, there was
中度重复序列根据重复序列的长度不同可分为重复序列平均长度为300 bp的______以及重复序列平均长度3500~5000 bp的______。