适合输送100℃以上，含有二氧化碳的酸性水管是（）
A、碳钢管
B、衬塑管
C、奥氏体不锈钢管
D、低合金管
参考答案：C
-Look！ That man looks like Mr Brown.
-It _____ be him， for he _____ America.
A. can't；has gone to B. may not；has gone C. can't；has been to
