【判断题】隧道纵断面设计中,坡度的大小应设置与之相适应的线路坡度,但是坡度不能太大。()
【多选题】钢筋混凝土枕是使用钢筋和混凝土浇筑而成的,按其结构形式可分为( )、( )和( )
【判断题】胶卷的宽容度是指胶卷能按比例纪录被摄景物明暗范围的能力:胶卷的宽容度意味着可允许曝光误差的能力。
【单选题】While on a motoring holiday abroad you might find yourself inDifficulties because
A.
you have brought the wrongDocuments with you
B.
your ferry has just left without you
C.
the nearest phone is out of order
D.
a repair to your car might take some time
【单选题】4 -2. 常用的三种甘汞电极为 (1) 饱和甘汞电极, (2) 摩尔甘汞电极, (3) 0.1 mol·dm -3 甘汞电极。甘汞电极反应为 Hg 2 Cl 2 (s) + 2 e - = 2Hg(l) + 2Cl - (aq) ,在 25°C 时三种甘汞电极的 φ 大小次序为
【单选题】__________ you‘ve got a chance, you might as well make full use of it.