【单选题】计算(a-b)(a+b)(a 2 +b 2 )(a 4 -b 4 )的结果是( )
【单选题】What is the passage mainly about?
A.
Being absent-minded is serious and dangerous.
B.
Being forgetful all the time is understandable.
C.
Forgetfulness is natural at times.
D.
How to protect yourself from memory 'tricks'.
【单选题】—Look out (小心) ! The traffic is moving fast. —It's dangerous _______cross the street. [ ]
【简答题】Unit 5 Word dictation (课本Unit 4 +Unit 3复习)2
【多选题】在设计、施工等过程中,建设单位需要履行的职责包括( )。
C.
对造价进行全过程管理和控制,建立公路工程造价管理台账
【单选题】已知a < b,则下列不等式中不正确的是 [ ]
【简答题】已知A×B=200,则: (A×3)×B=______ A×(B÷5)=______ (A÷2)×(B÷2)=______ (A÷4)×(B×4)=______ (A÷4)×(B×8)=______.