皮皮学,免费搜题
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【单选题】
砂浆回弹仪多久校正一次?
A.
一个月
B.
半年
C.
一年
D.
一天
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【简答题】平面束的方程A 1 x+B 1 y+C 1 z+D 1 +λ(A 2 x+B 2 y+C 2 z+D 2 )=0是否包含所有过直线 的平面.
【简答题】已知平面向量 a =( x 1 , y 1 ), b =( x 2 , y 2 ) ,若 | a |=2,| b |=3, a ? b =-6 ,则 x 1 + y 1 x 2 + y 2 =______.
【单选题】一平面通过两点M1(1,1,1),M2(0,1,-1),且垂直于平面x+y+z=0,则它的方程为( )。
A.
2x+y-z=0
B.
2x-y+z=0
C.
x-y-z=0
D.
2x-y-z=0
【单选题】—Why does he like koalas? —_____ he thinks they are very cute. [     ]
A.
Because
B.
So
C.
But
D.
And
【多选题】关于会计软件,以下说法正确的是
A.
会计软件是指专门用于会计核算、财务管理的计算机软件或软件系统
B.
会计软件能为会计核算、财务管理直接提供数据输入
C.
会计软件能生成凭证、账簿、报表等会计资料
D.
会计软件能对会计资料进行转换、输出、分析、利用
【单选题】— _____ — He is a bank clerk. [     ]
A.
Why does he like koalas?
B.
What does your father look like?
C.
Where is your father from?
D.
What does your father do?
【简答题】对于坐标平面内的任意两点P 1 (x 1 ,y 1 ),P 2 (x 2 ,y 2 ),定义运算“?”为:P 1 ?P 2 =(x 1 ,y 1 )?(x 2 ,y 2 )=(x 1 x 2 -y 1 y 2 ,x 1 y 2 +x 2 y 1 )若点M(x,y)(-2≤x≤-1),点N的坐标为(x,y)?(1,1),则点N到直线x+y+2=0距离的最大值为______.
【单选题】Why _____ he like dolphins? [     ]
A.
is
B.
are
C.
do
D.
does
【单选题】设集合A={(x,y)|x 2 +y 2 ≤1},集合B={(x,y)|log |x| |y|≤log |y| |x|,|x|<1,|y|<1},则在直角坐标平面内,A∩B所表示的平面区域的面积为 [     ]
A.
π
B.
C.
【单选题】Why does the man dislike living in the city?
A.
Because he like traveling.
B.
Because he does not like the house and neighbors in the city.
C.
Because he works near the country.
D.
Because he has a romantic attitude.
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