皮皮学，免费搜题
登录
搜题
【单选题】
目前我国的出生缺陷发生率是A.
1.3%
B.
6.4%
C.
4.7%
D.
7.1%
E.
8.4%
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】要在表中删除字段,一般( )
A.
如果存在表间联系的话，先删除此表间联系
B.
如果存在引用的话，先删除其他对象对该字段的引用
C.
如果存在重要数据的话，先保存好该字段的重要数据
D.
全面考虑上述3项
【简答题】Scientists find that hard-working people can live longer than idle(不工作的) people. Career women are healthier than housewives. Evidence shows that the jobless are in poorer health than the job-holder. A...
【简答题】The scientists were puzzled by the tricky question which left them __________ for an answer.
【简答题】Why do some people live to be older than others? You know the standard explanations :keeping a moderate diet,engaging in regular exercise,etc. But what effect does your personality have on your longev...
相关题目：