下列不属于X线管构造参数的有()
A.阳极靶面倾斜角度
B.灯丝尺寸
C.工作温度
D.最高管电压
E.阳极转速
参考答案:D
Our English teacher often _________ us stories in English. [ ]
A. tells
B. speaks
C. talks
结构性财政赤字