X射线设备工作周期主要因素是（）。
A.设备额定KV值
B.试件厚度
C.阳极冷却速度
D.焦点尺寸
参考答案：C
* * 分泌物稠厚豆渣样，伴外阴奇痒，检查见小阴唇内侧及 * * 黏膜附着白色膜状物，诊断为（）
A.滴虫 * * 炎
B.外阴 * * 假丝酵母菌病
C.细菌性 * * 病
D.慢性宫颈炎
E.非特异性外阴炎
______, they would certainly come and help us.
A．Had they time
B．Do they have time
C．Had they have time
D．Did they had time
