正常室壁运动速度规律,下列不正确的是()
A.后壁速度比室间隔快
B.心肌速度比心外膜快
C.心内膜速度最慢
D.收缩期速度小于舒张期
E.心外膜速度最慢
参考答案:C
The reason _____ he refused to attend the meeting was that they didn’t give him an invitation earlier.
A.how
B.which
C.why
D.because
SL-3000型地面仪器自然伽马测井曲线不存盘的原因有哪几个方面?