密度测井重点用来计算孔隙度及判断()、()。
参考答案:岩性;密度
—Where are my pencils?
—_____ in your pencil case. [ ]
A. It is
B. They're
C. They
D. Your pencils are
农业银行只办理由境内银行开立的信用证项下进口商品的提货担保。