地下工程的选址,工程地质要注意避免工程走向与岩层走向交角近乎( )。
A.垂直 B.平行C.45度 D.135度
参考答案:B
Cigarettes and alcohol do such ________ great harm to health that they can easily cause ________
weakening of our bodies.[ ]
A. a; /
B. /; the
C. a; the
D. /; /
10kV配电系统的基准电压宜选用( )电压。
A.10kV B.10.5kV C.11kV D.1.5kV