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【多选题】
骨髓的功能是[2分]A.
各类血细胞和免疫细胞发生的场所
B.
B细胞分化成熟的场所
C.
T细胞分化成熟的场所
D.
体液免疫应答发生的场所
E.
细胞免疫应答发生的场所
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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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