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【简答题】
已知函数f（x）=ax 2 +1，g（x）=x 3 +bx，其中a＞0，b＞0． （Ⅰ）若曲线y=f（x）与曲线y=g（x）在它们的交点P（2，c）处有相同的切线（P为切点），求a，b的值； （Ⅱ）令h（x）=f（x）+g（x），若函数h（x）的单调递减区间为[ - a 2 ，- b 3 ]，求： （1）函数h（x）在区间（一∞，-1]上的最大值M（a）； （2）若|h（x）|≤3，在x∈[-2，0]上恒成立，求a的取值范围．
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【单选题】The sellers usually send their ________ to the buyers immediately after the goods are loaded on board the ship, informing them of the shipment.
A.
Sales Contract
B.
Shipping Documents
C.
Shipping Advice
D.
Shipping Requirements
【单选题】The sellers usually send the __to the buyers immediately after the goods are loaded on board the ship, advising them of the shipment.
A.
shipping advice
B.
shipping instructions
C.
shipping date
D.
shipping port
【单选题】______, I wrote a letter to Henry Ford Ⅱ and told him what happened.
A.
Desperate
B.
Despite
C.
Inspiring
D.
Exciting
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