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【单选题】
某放大器电路在负载开路时的输出电压为 4V,接入12KΩ的负载电阻后,输出电压降为3V,这说明放大电路的输出电阻为( )。A.
10KΩ
B.
2KΩ
C.
4KΩ
D.
3KΩ
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【单选题】Which of the following statements is true about the 24 Solar terms?
A.
The 24 Solar Terms is based on the lunar calender.
B.
The 24 Solar Terms originated from the middle and lower reaches of the Yangtze River.
C.
The 24 Solar Terms finally came into being as early as in the Zhou dyanasty.
D.
The 24 Solar Terms has acted as a guidance in Chinese farming and is still in practice.
【单选题】Which of the following statements about 24 solar terms is NOT true? ( ).
A.
The traditional Chinese lunar calendar divides the year into 24 solar terms.
B.
The 24 solar terms were created thousands of years ago and is not useful today.
C.
The 24 solar terms serve as a practical guide for farmwork.
D.
People can use the 24 solar terms to predict weather in daily life.
【简答题】（7分）根据材料回答下列问题。 材料一 东风汽车总部由十堰搬迁至武汉示意图 材料二 武广高铁示意图 材料三 东风汽车公司始建于1969年，是中国汽车行业骨干企业之一。公司主要业务分布在十堰、襄樊、武汉和珠江三角洲四大基地，形成了“立足湖北，辐射全国，面向世界”的产业布局。 （1）分析武汉在交通上的区位优势。（3分） （2）分析武广高铁的开通对东风汽车集团发展的影响。（2分） ...
【多选题】Which of the following statements is true about the origin of the 24 solar terms?
A.
The 24 solar terms came into being as early as in the Shang dynasty.
B.
The 24 Solar Terms originated from the Reaches of the Yangtze River.
C.
The 24 solar terms came into being as early as in the Zhou dynasty.
D.
The 24 solar terms came into being as early as in the West Han dynasty.
【简答题】24节气中国常说的24节气包括那些？
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