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【多选题】
围绕构建内一点取出的边长无穷小的正六面体要注意一下A.
单元体是处于平衡状态的
B.
单元体代表的是构件内的一条线
C.
单元体上的各个面的应力均匀分布
D.
以上都不对
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举一反三
【多选题】There are three main kinds of alife, named for their approaches:
A.
soft, from software
B.
hard, from hardware (robotics)
C.
wet, from biochemistry (i.e. synthetic biology).
D.
all the above
【多选题】生态度是人们通过生活实践所形成的对人生问题的一种稳定的心理倾向和精神状态,它既具有态度的一般共性,又有自己的特点
A.
具有内在性
B.
具有社会性
C.
具有针对性
D.
具有相对稳定性
【简答题】There are three main goals of scientific research:
【简答题】There are three main theories in environmental ethics:
【简答题】图样中,机件的可见轮廓线用 (线型)画出,不可见轮廓线用 画出,尺寸线和尺寸界线用 画出,对称中心线和轴线用 画出。
【单选题】There are three main types of cryptography. 37For example, the first letters of “My elephant eats too many eels” Spell outthe hidden message “Meet me.”
A.
It is very hard to break a code without the code book.
B.
In any language, some letters are used more than others.
C.
Only people who know the keyword can read the message.
D.
As long as there have been codes, people have tried to break them.
G.
You can hide a message by having the first letters of each word spell it out. F.With a code book, you might write down words that would stand for other words. G.Another way to hide a message is to use symbols to stand for specific letters of the alphabet. F. G.
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