计算题:2009年5月18日1#液化器氯气纯度96%,含氢0.38%,求该时刻的最大的液化效率?
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根据《证券公司风险控制指标管理办法》的规定,证券公司持有一种权益类证券的市值与其总市值的比例不得超过(),但因包销导致的情形和中国证券监督管理委员会另有规定的除外。
A. 100%
B. 50%
C. 20%
D. 5%
A developer has used this code within a servlet: 62.if(request.isUserInRole("vip")) { 63.// VIP-related logic here 64.} What else must the developer do to ensure that the intended security goal is achieved?()
A. Create a user called vip in the security realm
B. Define a group within the security realm and call it vip
C. Define a security-role named vip in the deployment descriptor
Declare a security-role-ref for vip in the deployment descripto
狮院子纵横两条轴线上水渠相交处辟圆形水池,池周雕()头雄狮。水池四面4段水渠,象征()、()、()、(),为《古兰经》里的“生命之源”