The International Oil Pollution Prevention Certificate is valid for a period of______.A.one year from the date of issueB.five years from the date of issueC.three years from the date of issueD.four years from the date of issue
题目
The International Oil Pollution Prevention Certificate is valid for a period of______.
A.one year from the date of issue
B.five years from the date of issue
C.three years from the date of issue
D.four years from the date of issue
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第1题：
there seems to be growing evidence to suggest that women and men do pursue different _______ style.A、interactive
B、indifferent
C、interrogative
D、international
参考答案：A
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第2题：
The neighborhood boys like to play basketball on that（ ）lot.A.vague
B.vacant
C.vain
D.valid答案：B解析：句意：附近的男孩子们喜欢在那块空地上打篮球。A.vague意为“模糊不清的，不明确的”，C.vain指“徒然的；虚荣的”，D.valid指“正当的，有效的”。这三个词都不合题意，只有vacant是“空着的，无人的”意思，a vacant lot就是“空地”。 -
第3题：
基于initial语句产生普通时钟信号， parameter clk_period = 10; reg clk; initial begin clk = 0; ________________; end
A．always #(clk_period/2) clk = ~clk
B．forever #(clk_period/2) clk = ~clk
C．always #(clk_period) clk = ~clk
D．forever #(clk_period) clk = ~clk
always #(clk_period/2) clk = ~clk;forever #(clk_period/2) clk = ~clk -
第4题：
Which of the following marine insurance policies is normally purchased by the cargo owner？ ______.
A.Hull
B.Cargo
C.Protection and Indemnity
D.Pollution
正确答案：B
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第5题：
8、基于initial语句产生普通时钟信号， parameter clk_period = 10; reg clk; initial begin clk = 0; ________________; end
A．always #(clk_period/2) clk = ~clk
B．forever #(clk_period/2) clk = ~clk
C．always #(clk_period) clk = ~clk
D．forever #(clk_period) clk = ~clk
always #(clk_period/2) clk = ~clk;forever #(clk_period/2) clk = ~clk -
第6题：
以下关于VDB函数的语法正确的是（）。
A．VDB（cost，salvage，life，period，factor）
B．VDB（cost，salvage，life，period，month）
C．VDB（cost，salvage，life，per）
D．VDB（cost，salvage，life，start-period，end-period，factor，no-switch）
VDB（cost，salvage，life，start-period，end-period，factor，no-switch）