皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【单选题】
关于离心泵出现气蚀现象的原因，以下哪个描述错误的？
A.
将离心泵装在液面上方就会出现气蚀现象，安装在液面下方就不会出现气蚀现象
B.
离心泵的安装高度越高，越容易出现气蚀现象
C.
叶轮背面根部的K点处压力降低到液体的饱和蒸气压时，就会出现气蚀现象
D.
吸入管段的阻力损失越大，越容易出现气蚀现象
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【简答题】put ______ 2. drink _______ 3. cry _______ 4. pull ________ 5. ride ________ 6.begin ________ 7. sit ________ 8. run _________ 9. take _______ 10.sweep _______ 11. stop _______ 12. so...
查看完整题目与答案
【判断题】孔子被尊称为古代的“圣人”(sage)。译为“Kongzi was respect called an ancient "sage".”
A.
正确
B.
错误
查看完整题目与答案
【单选题】Who was called “Sage of Chinese Painting” in the history?
A.
Wu Daozi
B.
Wu Zhen
C.
Zhang Zeduan
D.
Dai Jin
查看完整题目与答案
【单选题】若要删除关系模式 S(Sno, Sname, Ssex, Sage) 的 Sage 属性,可用 ___
A.
ALTER TABLE S ‘ Sage ’
B.
DELETE Sage FROM S
C.
ALTER TABLE S DROP Sage
D.
UPDATE S Sage
查看完整题目与答案
【单选题】Among the many ancient Chinese painters, _________ of the Tang dynasty was called “Sage of Chinese Painting”.
A.
Zhang Zeduan
B.
Wu Zhen
C.
Qi Baishi
D.
Wu Daozi
查看完整题目与答案
【单选题】设有关系表S(Sno,Sname,Sage),其中Sage为年龄字段,则表达式 Sage NOT BETWEEN 18 AND 24 等价于()
A.
Sage<=18 OR Sage>=24
B.
Sage<=18 OR Sage>24
C.
Sage<18 OR Sage>=24
D.
Sage<18 OR Sage>24
查看完整题目与答案
【单选题】is called the Sage of Painting.
A.
Gu Kaizhi
B.
Wu Daozi
C.
Wang Wei
D.
Huang Gongwang
查看完整题目与答案
【单选题】Kongzi was a sage(圣人) and social philosopher and he is called ____in the west.
A.
Confucian
B.
Confucius
C.
Confucianism
D.
Confucianist
查看完整题目与答案
【简答题】take a taxi ________ 2. opposite the school ________ 3. traffic jam ________ 4. parking lot ________ 5. on the left ________ 6.road sign ________ 7.play badminton ________ 8.ride a bike ________ 9.go ...
查看完整题目与答案
【简答题】看一看，选择正确的汉语意思。 (     ) 1. walk (     ) 2. ride (     ) 3. or (     ) 4. my address (     ) 5. favourite (     ) 6. restaurant (     ) 7. far from (     ) 8. near (     ) 9. wear (     ) 10. like (    ...
查看完整题目与答案
相关题目：
【简答题】put ______ 2. drink _______ 3. cry _______ 4. pull ________ 5. ride ________ 6.begin ________ 7. sit ________ 8. run _________ 9. take _______ 10.sweep _______ 11. stop _______ 12. so...
查看完整题目与答案
【判断题】孔子被尊称为古代的“圣人”(sage)。译为“Kongzi was respect called an ancient "sage".”
A.
正确
B.
错误
查看完整题目与答案
【单选题】Who was called “Sage of Chinese Painting” in the history?
A.
Wu Daozi
B.
Wu Zhen
C.
Zhang Zeduan
D.
Dai Jin
查看完整题目与答案
【单选题】若要删除关系模式 S(Sno, Sname, Ssex, Sage) 的 Sage 属性,可用 ___
A.
ALTER TABLE S ‘ Sage ’
B.
DELETE Sage FROM S
C.
ALTER TABLE S DROP Sage
D.
UPDATE S Sage
查看完整题目与答案
【单选题】Among the many ancient Chinese painters, _________ of the Tang dynasty was called “Sage of Chinese Painting”.
A.
Zhang Zeduan
B.
Wu Zhen
C.
Qi Baishi
D.
Wu Daozi
查看完整题目与答案
【单选题】设有关系表S(Sno,Sname,Sage),其中Sage为年龄字段,则表达式 Sage NOT BETWEEN 18 AND 24 等价于()
A.
Sage<=18 OR Sage>=24
B.
Sage<=18 OR Sage>24
C.
Sage<18 OR Sage>=24
D.
Sage<18 OR Sage>24
查看完整题目与答案
【单选题】is called the Sage of Painting.
A.
Gu Kaizhi
B.
Wu Daozi
C.
Wang Wei
D.
Huang Gongwang
查看完整题目与答案
【单选题】Kongzi was a sage(圣人) and social philosopher and he is called ____in the west.
A.
Confucian
B.
Confucius
C.
Confucianism
D.
Confucianist
查看完整题目与答案
【简答题】take a taxi ________ 2. opposite the school ________ 3. traffic jam ________ 4. parking lot ________ 5. on the left ________ 6.road sign ________ 7.play badminton ________ 8.ride a bike ________ 9.go ...
查看完整题目与答案
【简答题】看一看，选择正确的汉语意思。 (     ) 1. walk (     ) 2. ride (     ) 3. or (     ) 4. my address (     ) 5. favourite (     ) 6. restaurant (     ) 7. far from (     ) 8. near (     ) 9. wear (     ) 10. like (    ...
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题