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【单选题】
电器元件的4位编码的含义是指:( )A.
前两位是电器编码，后两位是功能编码
B.
前两位是功能编码，后两位是电器编码
C.
4位编码是按电器元件先后顺序编排的
D.
无特定含义
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反馈参考答案：
举一反三
【简答题】C. “An apple a day keeps the doctor away.” Similarly, if we drink a little more water ever day, we may find that we need to go to the doctor a lot less often. A healthy diet is made up of water and a ...
【简答题】Have you ever heard of Back-to-Front Day? It is a festival in Britain. On that day, the s have to go to school. And the children? They are the policemen and firemen; they sit in the offices and c...
【多选题】孕产妇用药原则，哪些是正确的？（）
A.
必须有明确指征，避免不必要的用药
B.
不要擅自用药，必须在医生指导下使用
C.
能用一种药物，避免联合用药
D.
避免使用尚难确定对胎儿有无不良影响的新药
【简答题】孕产妇用药原则有哪些？
【单选题】After the earthquake, the president _____ a three-day period of mourning, the first-ever event of its kind for ordinary people.
A.
suffered
B.
declared
C.
confirmed
D.
informed
【简答题】“An apple a day keeps the doctor away.” Similarly, if we drink a little more water ever day, we may find that we need to go to the doctor a lot less often. A healthy diet is made up of water and a gre...
【单选题】-- Have you ever considered _______ Paris some day?
A.
visit
B.
visiting
C.
visits
D.
visited
【单选题】Ever since he caught the N1H1, Peter _____ so much pain that he is coughing day and night.
A.
suffered from
B.
has suffered from
C.
suffers from
D.
were suffering from
【简答题】孕妇用药原则有哪些?
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