要排除最常见部位的转移，首选哪一项检查
A．长骨平片
B．骨髓穿刺
C．肝脏B超
D．头颅平片
E．胸部平片
参考答案：E
A talk about how to look after pets _________ in our school next week .
A．gave
B．will give
C．was given
D．will be given
亚甲蓝作为厌氧培养指示剂，在无氧情况下呈( )
A．无色B．黄色C．棕色D．蓝色E．绿色
