【单选题】According to the author, technology is important because ______.
A.
resources on land are running short in ten years
B.
man can use it to explore the deeper sea
C.
it is a lot of fun diving into the sea
D.
ancient people used it to explore the sea
【简答题】在Excel工作簿中,工作表最多可设置16个。3.在Excel工作簿中,工作表最多可设置16个。
【简答题】计算: 16×( 1 8 -1)-(-2 ) 3 .
【简答题】图形密码。 1.已知△+○=36,△=○+○+○。问:△=( ),○=( )。 2.已知△+○=50,○=△+△+△+△。问:△=( ),○=( )。 3.已知□+□+○+○=16,○+○+□=10。问:○=( ),□=( )。
【简答题】16 的算术平方根是______,______的立方根是-3.
【简答题】计算下列两题: (1)345+55×16 (2)596-96×3.
【简答题】先化简,再求值: ( a-1 a+2 - 1 a-2 )÷ a 2 -8a+16 a 2 -4 ,其中a=-3.
【简答题】算一算,写出英文数字。 1. 2 + 10 = __________________ 2. 16 + 18 = __________________ 3. 50 + 50 = __________________
【简答题】计算: |-3|+16×(- 1 2 ) 3 .