疑有胃炎引起上消化道出血,为确诊合适的检查是()
A.吞线试验
B.粪便隐血试验
C.胃镜紧急检查
D.急诊胃肠钡餐检查
E.剖腹探查
参考答案:C
根据65×39=2535,在下面括号里填上适当的数。
25.35=( )×( )=( )×( )
2.535=( )×( )=( )×( )
253.5=( )×( )=( )×( )
0.2535=( )×( )=( )×( )
_______ the sun sinks lower, shadow spread ________ the courtyard.
A.When; through
B.When; across
C.As; through
D.As; across