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【单选题】
石油沥青的牌号主要根据其针入度、和软化点等质量指标划分，以( )表示。A.
针入度
B.
C.
软化点
D.
针入度、和软化点
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举一反三
【简答题】A．The man thinks his rent is very cheap. B．The man thinks his rent is very expensive. C．The man thinks he lives in a good area. D．The man thinks his rent is reasonable.
【简答题】A．To lower their exchange rates. B．To regulate their exchange rates. C．To raise their regulated rates. D．To make no change of their rates.
【简答题】Liner freight rates are usually lower than tramp rates while tramp rates are usually steadier than liner rates．（ ）
【简答题】A．To lower their exchange rates. B．To regulate their exchange rates. C．To raise their regulated rates. D．To make no change of their tales.
【判断题】T he hotel often gives preferential rates to guests who rent rooms on a long-term basis.
A.
正确
B.
错误
【单选题】计算机安全是指计算机资产安全
A.
计算机信息系统资源不受自然有害因素的威胁和危害
B.
信息资源不受自然和人为有害因素的威胁和危害
C.
计算机硬件系统不受人为有害因素的威胁和危害
D.
计算机信息系统资源和信息资源不受自然和人为有害因素的威胁和危害
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