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【单选题】
不属于一碳单位的是A.
—CH\r\n 3
B.
—CH\r\n 2 \r\n—
C.
—CH=
D.
CO\r\n 2
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举一反三
【单选题】Liz was accepted eventually by the headmaster David because she told the him ____________________
A.
she wanted to live a better life
B.
she used to take care of her mother, but she needed to take care herself now
C.
she could get to school on time
D.
all the above
【简答题】__________ is/are a large volume of air where the temperature, humidity and stability in the horizontal are more or less constant.
【简答题】中间继电器和接触器的区别。
【判断题】The major shortcoming of computer modelling is that changes to the model can easily be made and thus the effect of say a 10% error in one of the component concentrations can very readily be investigat...
A.
正确
B.
错误
【判断题】The major shortcoming of computer modelling is that changes to the model can easily be made and thus the effect of say a 10% error in one of the component concentrations can very readily be investigat...
A.
正确
B.
错误
【简答题】下列相对湿度测量仪表中( )种测量原理属于直接测量方法。 A．干湿球温度计 B．氯化锂温度计 C．氯化锂电阻湿度计 D．电子干湿球温度计 A． B． C． D．
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