入院时最有意义的检查是
A．胸腰椎X线正侧位片
B．腰椎MRI检查
C．腹部B超
D．肌电图检查
E．腰椎CT检查
参考答案：A
The students ought to wear school uniforms when they’re at school.
A．are supposed to
B．are allowed to
C．would like to
D．love to
简述冷冻式干燥机运行注意事项。
