当x=4时,代数式A=ax2﹣4x﹣6a的值是﹣1,那么当x=﹣5时,A的值是(

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问题:

当x=4时,代数式A=ax2﹣4x﹣6a的值是﹣1,那么当x=﹣5时,A的值是(     ).

考点:一元一次方程的解法代数式的求值
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Generally speaking, a British is widely regarded as a quiet, shy and conservative person who is (1) only among those with whom he is acquainted. When a stranger is at present, he often seems nervous, even (2) . You have to take a commuter train any morning or evening to (3) the truth of this.

Serious-looking businessmen and women sit reading their newspapers or dozing in a corner; hardly anybody talks, since to do so would be considered quite (4) .

(5) , there is an unwritten but clearly understood code of behavior which, once broken, makes the offender immediately the object of (6) .

It has been known as a fact that a British has a (7) for the discussion of their weather and that, if given a chance, he will talk about it (8) .

Some people argue that it is because the British weather seldom (9) forecast and hence becomes a source of interest and (10) to everyone.

This may be so. (11) a British cannot have much (12) in the weathermen, who, after promising fine, sunny weather for the following day, are often proved wrong (13) a cloud over the Atlantic brings rainy weather to all districts! The man in the street seems to be as accurate — or as inaccurate — as the weathermen in his (14) .

Foreigners may be surprised at the number of references (15) weather that the British (16) to each other in the course of a single day. Very often conversational greetings are (17) by comments on the weather. “Nice day, isn’t it” “Beautiful!” may well be heard instead of “Good morning, how are you” Although the foreigner may consider this exaggerated and comic, it is (18) .pointing out that it could be used to his advantage. If he wants to start a conversation with a British but is at a loss to know (19) to begin, he could do well to mention the state of the weather. It is a safe subject which will (20) an answer from even the most reserved of the British.

10()

A.dedication

B.suspicion

C.contemplation

D.speculation

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下列关于坡屋顶屋面承重结构的做法,表述不正确的是( )。

A.当凸出部分的跨度比主体跨度小时,可在屋面天沟处设置斜梁
B.当凸出部分的跨度比主体跨度小时,可把凸出部分的檩条搁置在主体部分屋面檩条上
C.当凸出部分跨度比主体跨度部分大时,可采用半屋架式梯形屋架
D.半屋架的两端都支撑在内墙上,当无内墙时支撑在中间屋架上

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原物与孳息

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右下第一磨牙Ⅱ度根分叉病变,龈缘高度低,角化龈过窄,牙周袋底超过膜龈联合

A.引导性组织再生术+植骨术
B.改良Widman翻瓣术
C.根向复位瓣术
D.截根术
E.牙龈切除术
下列情况最可能采取的术式

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肾损伤的临床表现不包括

A.休克
B.发热
C.腰腹部肿块
D.血尿
E.脓尿

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