下列式子正确的是( ) A.(a+5)(a-5)=a2-5 B.(a-b)2=a2-

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问题:

下列式子正确的是(  )
A.(a+5)(a-5)=a2-5B.(a-b)2=a2-b2
C.(x+2)(x-3)=x2-5x-6D.(3m-2n)(-2n-3m)=4n2-9m2
考点:多项式平方差公式完全平方公式
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Which of the following is true about Gloria

A.Gloria was the manager of a sporting goods store.

B.The manager never got a call from Gloria.

C.Gloria never got a satisfactory response from the manager.

D.The manager was running around the store when Gloria called.

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软钢从开始加载到拉断,有()4个阶段

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天然气滤网液位高是因为天然气中含水量太大引起的。()

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( )贷款具有较强政策性,且贷款额度受到限制。

A.公积金个人住房贷款

B.个人教育贷款

C.专项贷款

D.个人医疗贷款

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按快运办理的整车货物其运到期限为每()运价公里或其未满为1日。

A.250

B.300

C.500

D.800

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