虽经历磨难,奋发进取,却最终未能实现远大抱负的历史伟人是:[ ]
A.禹
B.张骞
C.司马迁
D.诸葛亮
答案:D
He sent me an E-mail, _____ to get further information.
A.hoped
B.hoping
C.to hope
D.hope
煮沸消毒时,为提高沸点达到105℃,促进杀灭芽胞,防止金属器皿生锈,一般在水中力口入
A.5~10g/L碳酸氢钠B.10~20g/L碳酸氢钠C.10~15g/L碳酸氢钠D.15~20g/L碳酸氢钠E.20~30g/L碳酸氢钠