【单选题】唯一约束与主键约束的区别是( )。
A.
唯一约束的值不允许为空,主键约束的值允许为空
B.
唯一约束的值允许为空,主键约束的值不允许为空
【简答题】Questions 5-7 Listen to the next part of talk. Choose THREE letters a-h. Give three
reasons why the speaker thinks so many people have an unhealthy diet. 17 17.mp3: ,,,A. it is cheaper to buy packet f...
【简答题】Questions 5-7 Now you will hear the next part of the recording. Choose three letters a-g. 17 曲目 17.mp3: Which three activities does Victoria enjoy? a. Contemporary dance b. Yoga c. Film and drama d. C...
【单选题】在护士交谈过程中,为了给患者提供思考的时间,护士可采的最佳用技巧
【单选题】question 17.mp3:
A.
Choose one’s own system of marking.
B.
Underline the key words and phrases.
C.
Make as few marks as possible.
D.
Highlight details in a red color.
【单选题】在护士交谈过程中,为了给患者提供思考的时间,护士可采用的最佳技巧为
【单选题】在护患交谈过程中,为了给患者提供思考的时间,护士可采用的技巧
【判断题】禹治水有功众酋长拥戴,每个州都向他进献贡金,禹就命人把进献的贡金,铸造九鼎,并把各州内的山川名物、珍禽异兽铸在上面,以示天下太平。后来,在古代,鼎视为立国的重器,是政权的象征。
【单选题】mp3: Choose the best answer.
【单选题】Name the theme of the Earth Day.
C.
Helping the environment