在管道保护工作中,处理第三方施工与管道之间的问题,应做到()
A、及时总结
B、及时发现
C、及时处理
D、及时汇报
参考答案:B, C, D
读图,回答下列问题:
(1)地球公转的周期是_________。
(2)每年6、7、8三个月是北半球的_________季。
(3)当地球在公转轨道上由A位置转到B位置时,泉州昼夜长短的变化情况是__________________。
He expressed his gratitude to his headteacher, without _____ help he wouldn't have made such great progress
in his studies. [ ]
A. whose
B. his
C. whom
D. which