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求解面积 题目描述 平面上有一个三角形,它的三个顶点坐标分别为(x1, y1), (x2, y2), (x3, y3) 求三角形的面积公式为:S=(x1*y2+x2*y3+x3*y1-x3*y2-x2*y1-x1*y3)/2; 请编写程序计算这个三角形的面积。 输入 输入仅一行,包括6个单精度浮点数,分别对应x1, y1, x2, y2, x3, y3。 输出 输出也是一行,输出三角形的面积,精确到小数点后两位。 样例输入 1 1 4 8 9 12 样例输出 11.50
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【单选题】在Word 中,下列关于窗口的叙述,不正确的是(34).
A.
窗口命令下的拆分功能可以将文档分为两个文档窗口
B.
多文档窗口间的内容可以进行剪切、复制等操作
C.
Word 允许同时打开多个文档进行编辑，每一个文档都有一个窗口
D.
在文档的编辑状态下，不可以使用窗口命令新建一个窗口
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【单选题】How much does a Car Buyer magazine cost?
A.
5303808
B.
5300388
C.
5033808
D.
5308308
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【单选题】How does the buyer solve the problem?
A.
Deliver the goods immediately and ask for additional shipping fees.
B.
Dliver the good the next day and cover the shipping fees
C.
Deliver the goods immediately and cover the shipping fees.
D.
Dliver the good the next day and ask for additional  shipping fees
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【单选题】党的十九大报告特别强调,要“坚持正确舆论导向,高度重视传播手段建设和创新,提高新闻舆论的”。
A.
传播力、引导力、影响力、公信力
B.
传播力、向心力、影响力、创新力
C.
引导力、影响力、创新力、威信力
D.
引导力、影响力、公信力、向心力
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【单选题】Try to obtain information from survivors
A.
Try to get some information from the survivors
B.
Try to learn from the survivors
C.
Try to ask about the survivors` conditions
D.
Try to know about the survivors
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【单选题】20130234在Word 中,下列关于窗口的叙述,不正确的是(34).
A.
窗口命令下的拆分功能可以将文档分为两个文档窗口
B.
多文档窗口间的内容可以进行剪切、复制等操作
C.
Word 允许同时打开多个文档进行编辑，每一个文档都有一个窗口
D.
在文档的编辑状态下，不可以使用窗口命令新建一个窗口
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【单选题】电子控制喷射柴油机的喷油定时
A.
由凸轮确定
B.
由电子控制单元确定
C.
由曲轴转角传感器确定
D.
由伺服油泵确定
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【单选题】How can the SART’s audible tone monitor be used?______.
A.
It informs survivors that assistance may be nearby
B.
It informs survivors when the battery’s charge condition has weakened
C.
It informs survivors when the SART switches to the standby mode
D.
It informs survivors that a nearby vessel is signaling on DS
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【单选题】To keep injured survivors warm in the water after abandoning a ship，they should（）.
A.
be placed in the middle of a small circle formed by the other survivors in the water
B.
float on their backs with their arms extended for maximum exposure to the air
C.
remove their life preservers and hold on to the uninjured survivors
D.
sip seawater at intervals of fifteen minutes
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【单选题】How does the buyer respond to the seller's cut?
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she wants to reduce the price more.
B.
She is satisfied.
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She needs to report to her boss for a reply.
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相关题目：
【单选题】在Word 中,下列关于窗口的叙述,不正确的是(34).
A.
窗口命令下的拆分功能可以将文档分为两个文档窗口
B.
多文档窗口间的内容可以进行剪切、复制等操作
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Word 允许同时打开多个文档进行编辑，每一个文档都有一个窗口
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在文档的编辑状态下，不可以使用窗口命令新建一个窗口
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【单选题】How much does a Car Buyer magazine cost?
A.
5303808
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C.
5033808
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5308308
查看完整题目与答案
【单选题】How does the buyer solve the problem?
A.
Deliver the goods immediately and ask for additional shipping fees.
B.
Dliver the good the next day and cover the shipping fees
C.
Deliver the goods immediately and cover the shipping fees.
D.
Dliver the good the next day and ask for additional  shipping fees
查看完整题目与答案
【单选题】党的十九大报告特别强调,要“坚持正确舆论导向,高度重视传播手段建设和创新,提高新闻舆论的”。
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传播力、引导力、影响力、公信力
B.
传播力、向心力、影响力、创新力
C.
引导力、影响力、创新力、威信力
D.
引导力、影响力、公信力、向心力
查看完整题目与答案
【单选题】Try to obtain information from survivors
A.
Try to get some information from the survivors
B.
Try to learn from the survivors
C.
Try to ask about the survivors` conditions
D.
Try to know about the survivors
查看完整题目与答案
【单选题】20130234在Word 中,下列关于窗口的叙述,不正确的是(34).
A.
窗口命令下的拆分功能可以将文档分为两个文档窗口
B.
多文档窗口间的内容可以进行剪切、复制等操作
C.
Word 允许同时打开多个文档进行编辑，每一个文档都有一个窗口
D.
在文档的编辑状态下，不可以使用窗口命令新建一个窗口
查看完整题目与答案
【单选题】电子控制喷射柴油机的喷油定时
A.
由凸轮确定
B.
由电子控制单元确定
C.
由曲轴转角传感器确定
D.
由伺服油泵确定
查看完整题目与答案
【单选题】How can the SART’s audible tone monitor be used?______.
A.
It informs survivors that assistance may be nearby
B.
It informs survivors when the battery’s charge condition has weakened
C.
It informs survivors when the SART switches to the standby mode
D.
It informs survivors that a nearby vessel is signaling on DS
查看完整题目与答案
【单选题】To keep injured survivors warm in the water after abandoning a ship，they should（）.
A.
be placed in the middle of a small circle formed by the other survivors in the water
B.
float on their backs with their arms extended for maximum exposure to the air
C.
remove their life preservers and hold on to the uninjured survivors
D.
sip seawater at intervals of fifteen minutes
查看完整题目与答案
【单选题】How does the buyer respond to the seller's cut?
A.
she wants to reduce the price more.
B.
She is satisfied.
C.
She needs to report to her boss for a reply.
查看完整题目与答案