磷化锌中毒常用的洗胃液为
A.鸡蛋B.0.1%硫酸铜C.1%盐水D.脂肪E.温开水
参考答案:B
超声诊断睾丸扭转的主要依据是()
A.睾丸肿大
B.睾丸内出现异常暗区
C.睾丸内无血流信号或血流信号减少
D.精索呈麻花征
E.睾丸鞘膜积液
Chinese people have been using paper for over______ years.
A.thousands
B.two thousand
C.thousands of
D.thousand