4的算术平方根是:4=2.
310-π的绝对值是:|310-π|=π-310.
故答案是:2;π-310.
Perhaps the best sign of _____ computer and internet use pushes up demand for paper comes from the high-tech industry itself.
A.how
B.what
C.why
D.that
3岁男孩,自6个月开始出现紫绀,有杵状指,胸部X线检查呈"靴型"心影,肺血减少,最可能的诊断()
A.室间隔缺损
B.动脉导管未闭
C.法洛四联症
D.肺动脉狭窄
E.艾森曼格综合征