消化道出血患者出现黑粪提示每日出血至少有()
A.10~20ml
B.30~50ml
C.50~100ml
D.100~200ml
E.200~300ml
参考答案:C
有如下赋值语句,结果为“大家好”的表达式是( )。 a=“你好” b=“大家”
A. b+AT(a,1)
B. b+RIGHT(a,1)
C. b+LEFT(a,3,4)
D. b+RIGHT(a,2)
Seldom _____ what I says. [ ]
A. does my mother care for
B. my mother cared about
C. my mother care for
D. does my mother care about