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根据《水利水电工程施工通用安全技术规程》,水下开挖工程,有冰层覆盖时土壤和岩石爆破,其危险区域的最小半径不小于400m。

A. 正确
B. 错误

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A. 正确
B. 错误

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When a customer attempts to manage virtual machines, virtual images and system pools with the VMControl Express Edition, all operations fail except for managing virtual machines. What is recommended to resolve this situation?()

A. Upgrade to VMControl Standard Edition
B. Upgrade to VMControl Enterprise Edition
C. Upgrade to latest version of VMControl Express Edition
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