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吸氧放热物质主要包括油脂类、煤炭类和橡胶类、类、炭粉类、含硫矿物或化合物类等,它们自然生热机理主要是 和 。
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【简答题】What are the two kinds of sleep we experience every night? Every night we have two kinds of sleep: active sleep and
【单选题】There are two kinds of cross-cultural communication: unilateral communication and _________.
A.
successful communication
B.
verbal communication
C.
bilateral communication
D.
unsuccessful communication
【简答题】阅读短文,用适当的词填空,使短文意思完整。 There are two main kinds of sports. These two kinds of sports are team sports and individual(个人的) sports. Team sports are such sports as baseball, basketball, and 1 . Team sports...
【单选题】以下哪一个是南京师范大学图书馆的网址?
A.
lib.njnu.edu.cn
B.
www.njnu.lib.edu.cn
C.
library.njnu.edu.cn
D.
www.njnu.edu.cn
【单选题】What's the difference between the two phases of experiments?
A.
The two kinds of vaccines were vaccinated together on volunteers in the first phase.
B.
The two kinds of vaccines will be vaccinated together on volunteers in the second phase.
C.
The combined safety of vaccines had been tested in the first phase.
D.
The safety of each vaccine will be tested in the second phase.
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