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【判断题】
二、判一判。 1 . 一个顶角是 80 度的等腰三角形 , 一定是一个钝角三角形。 ( ) 2 . 一个三角形可能有两个钝角。 ( ) 3 . 将一个三角形剪成两个三角形 , 那么这两个三角形的内角和都是 90° 。 ( ) 4 . 直角三角形中的两个锐角的和正好等于 90° 。 ( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】将工作表标题跨列合并后居中并适当调整其字体、加大字号,并改变字体颜色。适当加大数据表行高和列宽,设置对齐方式及销售额数据列的数值格式(保留2位小数),并为数据区域增加边框线。
【单选题】What was the thing that he was never able to remember?
A.
What happened immediately before or during the accident.
B.
What he had done for ten weeks after the accident.
C.
All of the previous years before the accident.
D.
His way round the village itself.
【单选题】设A是n阶方针,A经过若干次初等列变换变为B,则( )。
A.
B.
存在可逆矩阵P,使得PA=B
C.
存在可逆矩阵P,使得PB=A
D.
存在可逆矩阵P,使得BP=A
【简答题】There is so much to know and so many seemingly contradictory theories on the subject of nutrition and its relationship with human body and mental function. (根据要求选出答案,用大写字母填写,无标点!) 1. 动词不定式作定语 ( ) 需要了...
【简答题】The Internet is becoming more and more important in our life. How much do you know about it? What is the Internet? The Internet is a large, worldwide collection of computer networks. A network is a sm...
【简答题】影响目视检测质量的因素主要可划分为（）、（）、（）和（）等四大方面的因素
【单选题】Tom felt sure he would get the post, but he was never even considered for it. That was a smack in the eye for him.
A.
nothing serious
B.
nothing important
C.
a humiliating rebuff
D.
an expected disappointment
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