现存世界上最古老的石拱桥是（）。
A.卢沟桥
B.赵州桥
C.安平桥
D.西安桥
参考答案：B
His remarks ________ me in my opinion that he was a very considerate boy.
A．concerned
B．contacted
C．confirmed
D．considered
测量站用变10%～90%额定电压之间的每（）级和90%～115%额定电压之间的每5%级的空载损耗和空载电流，其值应符合产品订货要求。
A.0.4
B.0.3
C.0.2
D.0.1
