弹簧管的材质，因被测介质的物理化学性质和被测压力的（）而不同。
A、零点
B、量程
C、高低
D、测量误差
参考答案：C
Mrs. White found her husband ______ by letters and papers and ______ very worried. [ ]
A. surrounding;looked
B. surrounded;looked
C. surrounding; looking
D. surrounded; looking
某货物FOB价格为USD 32.5/DOZ，发往东京的运费为其FOB价格的6%，保险费率为0.5%，试报CIF价。
