糖尿病的大、中动脉病变主要是动脉粥样硬化,有()
A.脑动脉
B.椎动脉
C.肾动脉
D.体表动脉
E.以上都是
参考答案:E
He was looking impatient at the visiting salesman, who showed no signs of getting ready to leave.
A.patient
B.patience
C.impatience
D.impatiently
在电源的三角形联接中其线电压等于()的相电压,线电流等于()的相电流。