某男，50岁。右下肢跛行5年，诊断为雷诺氏综合征，首选的治疗药物为
A．间羟胺
B．阿拉明
C．酚妥拉明
D．普萘洛尔
E．多巴胺
参考答案：C
People say it is Canada’s most beautiful city, _____ by mountains and the Pacific Ocean.
A．surrounding
B．surround
C．to surround
D．surrounded
农用拖拉机用变速箱
