问题
判断题
圆锥破碎机空载试车正常连续运转时间不应小于2小时。
答案
参考答案：对
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圆锥破碎机空载试车正常连续运转时间不应小于2小时。
参考答案：对
An analyst does research about future contracts. A commodity futures account has the following margin balances:
| Initial margin requirement | $18700 |
| Maintenance margin requirement | $14300 |
| Margin balance | $12500 |
A. $1800
B. $4400
C. $6200