下列哪几项急腹症在诊断有困难时可采用诊断性腹腔穿刺()
A.机械性肠梗阻
B.腹腔内出血
C.消化道大出血
D.急性腹膜炎
E.肠破裂
参考答案:B, D, E
Robert failed to seek a job for his poor education, though he is _______ to get one to support his family.
A.wanting
B.looking forward
C.fighting
D.dying
关系数据库语言SQL是一种( )语言,使用方便。
A.高级算法
B.汇编
C.过程性
D.说明性