单项选择题 —Shall we go to the movie tonight? —No, Id rather ______ at home with our baby. Youd better not leave it to the babysitter at night. A．you stayed B．you stay C．stayed D．stay

未知题型 某中等氟病区的患者，其症状为肉眼可见牙齿微黄，并有部分人的牙齿缺损，骨关节疼痛，四肢僵直，进而行动困难。化验：尿氟、发氟均增高。最常见的氟中毒流行类型是

未知题型 为证实诊断首先需要的检查是A．X线平片B．CTC．MRID．核素骨扫描###SXB#