【单选题】
已知三点A(10、20、15)、B(10、0、30)、C(0、10、0),则在坐标面上的点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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A、B、C三点
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B点
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B、C两点
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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C点
【单选题】
已知四点A(10、20、30)、B(30、20、10)、C(10、20、10)、D(20、20、30),则对H面的重影点为______。
①
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
A与D,D点可见
②
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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B与C,B点可见
③
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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A与C,A点可见
④
Normal
0
7.8 磅
0
2
false
false
false
EN-US
ZH-CN
X-NONE
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mso-para-margin:0cm;
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A与C,C点可见
【单选题】
x>0 && x<=10的相反表达式为( )。
【单选题】
x>0 && x<=10的相反表达式为(????)
【单选题】
x>0&&x<=10的相反表达式为()。
【单选题】
设intx=10,a=0,b=25;,条件表达式x1?a+10︰b的值是( )
【单选题】
设有定义 int a[10]={0,0,0,0,0,0,0,0,0,0};则说法正确的是( )。
③
数组a有10个元素,其中a[0]的值为0,其他元素的值不确定
【单选题】
在以下梯形图程序,D10中的初始值为H0,设某扫描周期中X0变成ON,则再经10个扫描周期后,D10中的值是()
【单选题】
能正确表示a>=10或a<=0的关系表达式是 ( )
①
a>=10 or a=10 | a=10 && a=10 | | a<=0