用深孔钻钻屑深孔时,为了保持排屑流畅,可使流入的切屑液具有一定的压力。
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我国民用电网主要参数为()。
A. 60H220V
B. 50H220V
C. 60H110V
D. 50H380V
VAST卫星通信系统拨测周期为()。
A. 每周一次
B. 每月一次
C. 每季度一次
D. 每半年一次
普通套间家具配备与标准间家具配备相比较,应增设单独的()等。
A. 床头柜
B. 行李柜
C. 梳妆台
⑥We are considering providing each of our sales representatives with an eight-digit electronic calculator. Last week I saw a demonstration of your Model GH Wizard at the Boise Business Show, and I think it would fill our needs very nicely. I understand that the Wizard retails for$33.95. Is there a trade discount for companies that buy in fairly large quantities? ⑦Our initial order would be for about 80 units and reorders in perhaps lots of 20. 文中⑦段画线部分翻译正确的是()。
A. 我们最先的订货是80台,然后再订20台之多。
B. 我们预先订货80台,后续还会有几批每次20台的订货。
C. 我们预先订货80台,然后还有很多新的20台。