婴儿在生后多长时间内不易患缺乏叶酸所致的巨幼细胞贫血()
A.生后2个月内
B.生后3个月内
C.生后4个月内
D.生后5个月内
E.生后6个月内
参考答案:C
为确诊主动脉瓣狭窄,最主要的检查方法是
A.超声心动图检查
B.心电图检查
C.X线检查
D.心导管检查
E.核素心室造影
When the seller pays for the goods to be loaded on board the container ship, but does not pay freight or insurance, what is most appropriate term ()
A.DDU
B.CFR
C.FCA
D.CIF