测井下放电缆时，绞车司机应随时注意（）情况，及时发现遇阻，以防电缆打扭、打结。
A.下放速度
B.深度显示
C.张力变化
D.测井曲线
参考答案：C
枣树
Allow children to voice their opinions, ____ they are different from your own.[ ]
A. until
B. even if
C. unless
D. as though
