38._____ is a delivery model for software which provides the ability to customize data entry forms, screens, reports, and the like, and access to software development tools to alter the way in which the software works by adding new modules (services) and/or making modifications to existing modules.
A.IaaS
B.SaaS
C.SLA
D.PaaS
查看答案
39._____ involves using the cloud for a vast majority of your computing needs.
A.IaaS
B.SaaS
C.SLA
D.PaaS
40.Which of the following is true of cloud computing?
A.It does not offer pay-per-use options and increases a firm's capital expenditures.
B.It raises barriers to entry in markets that require an investment in technology.
C.It gives immediate access to a broad range of application software.
D.It is a risk-free alternative to acquiring physical computing infrastructure.
买方来电表示接受发盘，但要求将D/P即期改为D/P远期，卖方缄默，此时合同成立。
A. 对
B. 错
根据《公约》规定，构成一项有效发盘，必须明确规定买卖货物的品质、数量、包装、价格、交付和货款的支付等六项主要交易条件缺一不可。
A. 对
B. 错
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