单纯性小肠梗阻最典型的X线表现为()
A.膈下新月状气体影
B.阶梯状液平
C.小肠胀气扩张
D.咖啡豆征
E.足球征
参考答案:B
These foreign teachers say they will go ________ they are needed to teach English after they arrive in China.
A.to place
B.to where
C.wherever
D.to matter where
在FOB、CFR、CIF三种合同中,第一种卖方承担的责任和费用最大,而第三种最小。 ( )