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【简答题】
按编制单位和执行的范围及管理权限分类,工程建设定额分为() A. 全国统一定额 B.补充定额 B. 企业定额 D.地区统一定额
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皮皮学刷刷变学霸
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【简答题】已知 a ? b =-12 2 ，| a |=4， a 和 b 的夹角为135°，则| b |=______．
【简答题】已知4和b的比例中项是6，则b=______．
【简答题】已知点A（3，a）和点A′（b，-4）关于原点对称，则a=______，b=______．
【简答题】已知 和 是方程ax+by=4的解，则a﹣b=( )．
【多选题】Situation: Jim asked Magid to come into his home. They talked about what they had been doing since Magid left the company. Magid stayed about three hours and then said, "I'd better go now." Jim got up...
A.
Magid thought that Jim should have asked him to stay longer.
B.
Magid thought that he didn't stay long enough.
C.
Magid couldn't understand why Jim thanked him for coming.
【简答题】已知实数a，b分别满足3a 4 +2a 2 -4=0和b 4 +b 2 -3=0，求 4 a 4 + b 4 的值．
【单选题】They said goodbye, little knowing that they were never again. [ ]
A.
met
B.
meeting
C.
to meet
D.
to be met
【多选题】在标志设计中,下列做法 不符合 人性化设计的有
A.
优先满足醒目清晰和通俗易懂两个基本要求
B.
图形只包含所传达信息的主要特征，减少图形要素，避免不必要的细节
C.
标志图形采用复杂多变和凌乱的轮廓界限，加强图形周长对面积之比
D.
优先采用非对称图形以加强造型的艺术美感
【简答题】(12分) 在ΔABC中，已知 = 4， A = 45°， B = 15°，求 a 、 b、 和
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