道口替班人员必须经过()培训,并经考核合格。
A.技规业务知识
B.安规业务知识
C.行规业务知识
D.道口业务知识
参考答案:D
向50gFeCl3溶液中投入一定量的钠,待反应完毕后,过滤,得到仍有黄色的溶液45.9g,则投入钠的质量
A.4.6g
B.4.1g
C.6.9g
D.9.2g
These sweaters are too small for me. Would you show me _____ one?[ ]
A. the other
B. other
C. another
D. some