能明显舒张肾血管增加肾血流的药物是
A．肾上腺素
B．多巴胺
C．去甲肾上腺素
D．间羟胺
E．去氧肾上腺素
参考答案：B
Such a link, carrying power, would be an alternative to conventional power lines, with far better ______ integration into the natural environment.
A．aesthetic
B．classic
C．plastic
D．domestic
与肝细胞癌的发生无关的是
A．亚硝胺类化合物
B．肝炎病毒
C．黄曲霉毒素
D．青霉菌
E．血吸虫
