在阀门检验过程中,带有蒸汽夹套的阀门,夹套部分应以()倍的蒸汽工作压力进行压力试验。
A.1
B.1.5
C.2
D.2.5
参考答案:B
The news is spreading around the airport is a heavy storm is coming.
A.what; /
B.that; that
C./; that
D.that; which
就卖方承担的风险而言,CIF和CFR两种贸易术语相比,( )。
A.前者大B.后者大C.两者相同D.不能确定