I was _______ discouraged by this failure ______ try again.
A. too much…to
B. much… as to
C. enough…to
D. very much…to
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The new discoveries there have ____ greatly to our knowledge of the ancient civilization in China.
A. attached
B. proceeded
C. added
D. contributed
阿累尼乌斯定律确定了()
A. 化学反应速度与反应压力之间的关系
B. 化学反应速度与反应温度之间的关系
C. 化学反应速度与反应浓度之间的关系
D. 化学反应速度与反应质量之间的关系
After the revolution, the political ______ of that country remained tense.
A. air
B. weather
C. atmosphere
D. climate
下列()项在地基介质内部传播,其质点运动方向与波的传播方向一致。()
A. 压缩波
B. 剪切波
C. 瑞利波
D. 乐夫波