确诊肾动脉狭窄有赖于：（）
A.年轻人血压显著升高
B.上腹部可听到血管杂音
C.静脉肾盂造影
D.肾动脉造影
E.放射性核素肾图
参考答案：D
无锡是京杭大运河唯一穿城而过的城市，让无数中外游客如痴如醉，你知道京杭大运河最早是谁统治时期开凿的吗？
A．隋文帝
B．隋炀帝
C．唐太宗
D．唐玄宗
He said that only after he went abroad _______ what his motherland meant to him.
A．he realized
B．he had realized
C．had he realized
D．did he realize
