问题
单项选择题
下列爆破方式飞石飞出距离最远的是()。
A、采场内深孔微差正常爆破
B、采场内深孔齐发正常爆破
C、处理大块的二次爆破
答案
参考答案:C
下列爆破方式飞石飞出距离最远的是()。
A、采场内深孔微差正常爆破
B、采场内深孔齐发正常爆破
C、处理大块的二次爆破
参考答案:C
Notice November 22 The students of Class 3, Grade 3 will go to the Red Star Village and help the farmers to get in rice. We will meet on the school playground at 7 o’clock on the morning of Saturday. Please get everything ready and take lunch with you. Be sure to put on the old clothes. And we will be back to school at half past five in the afternoon. Everyone should get there on time. Miss Liu Information Card
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