皮皮学，免费搜题
登录
搜题
【判断题】
对表增加约束可以采用 alter table ...add constraint.. 的语法。
A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】常用于去痰,又可以酸化尿液的药物。
A.
右美沙芬。
B.
喷托维林。
C.
氯化氨。
D.
乙酰半胱氨酸。
E.
溴已新。
查看完整题目与答案
【简答题】The result of research carried out by social scientists show that ________. A) people do not realize the importance of looking one’s best B) women in pursuit of managerial jobs are not likely to be pa...
查看完整题目与答案
【判断题】6-12 岁的小学生生长发育很快,要保证充足的睡眠时间,一般为8-9小时。 ()
A.
正确
B.
错误
查看完整题目与答案
【单选题】In view of all sorts of rumors and guesses, experts carried out some careful and scientific research and the possibility of a second earthquake in this area.
A.
blamed
B.
discounted
C.
attended
D.
charged
查看完整题目与答案
【单选题】The research carried out in eight countries______.
A.
reveals the relationship between sleep problems and age
B.
provides evidence that lack of sleep affects people's health
C.
puts forward the theory that sleep problems are a kind of disease
D.
proves that sleep problems will lead to smoking and poor diet
查看完整题目与答案
【简答题】Before Lyubomirsky carried out her own research, scientists investigated happiness mainly through ______.
查看完整题目与答案
【简答题】certain industrial and social research is carried out by any specialist agencies．Interviews 36__________ 查看材料
查看完整题目与答案
【单选题】She ______ her research into the cause of cancer in spite of financial problems.
A.
carried away
B.
put forward
C.
consisted in
D.
persisted in
查看完整题目与答案
【简答题】《中华人民共和国环境影响评价法》所指的环境影响评价文件是对（ ） 的统称。
查看完整题目与答案
【判断题】中国古典信仰的至上神,在青铜器时代已经被称作“上帝”了。
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】常用于去痰,又可以酸化尿液的药物。
A.
右美沙芬。
B.
喷托维林。
C.
氯化氨。
D.
乙酰半胱氨酸。
E.
溴已新。
查看完整题目与答案
【简答题】The result of research carried out by social scientists show that ________. A) people do not realize the importance of looking one’s best B) women in pursuit of managerial jobs are not likely to be pa...
查看完整题目与答案
【判断题】6-12 岁的小学生生长发育很快,要保证充足的睡眠时间,一般为8-9小时。 ()
A.
正确
B.
错误
查看完整题目与答案
【单选题】In view of all sorts of rumors and guesses, experts carried out some careful and scientific research and the possibility of a second earthquake in this area.
A.
blamed
B.
discounted
C.
attended
D.
charged
查看完整题目与答案
【单选题】The research carried out in eight countries______.
A.
reveals the relationship between sleep problems and age
B.
provides evidence that lack of sleep affects people's health
C.
puts forward the theory that sleep problems are a kind of disease
D.
proves that sleep problems will lead to smoking and poor diet
查看完整题目与答案
【简答题】Before Lyubomirsky carried out her own research, scientists investigated happiness mainly through ______.
查看完整题目与答案
【简答题】certain industrial and social research is carried out by any specialist agencies．Interviews 36__________ 查看材料
查看完整题目与答案
【单选题】She ______ her research into the cause of cancer in spite of financial problems.
A.
carried away
B.
put forward
C.
consisted in
D.
persisted in
查看完整题目与答案
【简答题】《中华人民共和国环境影响评价法》所指的环境影响评价文件是对（ ） 的统称。
查看完整题目与答案
【判断题】中国古典信仰的至上神,在青铜器时代已经被称作“上帝”了。
A.
正确
B.
错误
查看完整题目与答案