以下历史现象的出现不属于同一朝代的是
A．曲辕犁的创制
B．赵州桥的建成
C．筒车的创制
D．遣唐使来中国
答案：B
读出下图给出的螺旋测微器和游标卡尺的示数：螺旋测微器的示数为________mm；游标卡尺的示数__________cm。
--- It took me two hours or so to walk here.
--- But you ______ here in Billy’s car.
A．could have come
B．must have come
C．must come
D．could come
