【简答题】海岛国家,如英国、日本等,也常用 _____ _____ 表示对外贸易。
【简答题】海岛国家,如英国、日本等,常用____表示对外贸易。
【多选题】钢轨核伤
A.
钢轨核伤,又称黑核或白核,多数发生在钢轨轨头内,是轨头横断面裂纹,表现了典型的疲劳特征,危害性极大。
B.
当核伤面积占轨头5%~10%,静力强度只有正常钢轨的16%~40%、
C.
当核伤面积占轨头10%~15%,疲劳强度下降90%以上、
D.
当核伤面积发展到轨头截面的20%~30%(相当于直径21~ 40mm )将发生断轨。
【单选题】– When did you ________ to do the work? - Two months ago, we are through 80% of it at the moment.
【简答题】Correct one verb in each sentence.(请直接把正确形式的动词写出来即可,不需划出错误的动词) We arrived the plane and after 20 minutes it took off. I love walking in the mountains and seeing at beautiful scenery. After the plane l...
【判断题】印度首部新德里,素有印度“商业首都”和“金融首都”之称。( )
【单选题】Only when the CIA Director David was forced to resignthat it‘s hard to keep our e-mail secret.
【简答题】Scientists are working hard to deve10p better aerials for mobile phones , a spokesman for Phikia Phones said today. ‘It really (16) users when they 10se the signal in the middle of a call' so we are d...
【单选题】当核伤面积发展到轨头截面的 ( ) ( 相当于直径 21 ~ 40 mm) 将发生断轨。
【单选题】____from the 18 th floor when he saw the police coming near.