39._____ involves using the cloud for a vast majority of your computing needs.
A.IaaS
B.SaaS
C.SLA
D.PaaS
查看答案
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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