皮皮学，免费搜题
登录
搜题
【单选题】
我国健康公民自愿献血的年龄是A.
18~50周岁
B.
20~60周岁
C.
18~40周岁
D.
.18~55周岁
E.
16~50周岁
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】More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
A.
is done
B.
was done
C.
will be done
D.
to be done
【简答题】MPN是指 。
【单选题】In the past, he rarely spoke unless others were speaking about something that ______ to him.
A.
tended
B.
addicted
C.
appealed
D.
applied
【简答题】通过命令( )可以查看表或数据字典的字段信息,即表或数据字典有哪几列。如果想了解oracle有哪些数据字典供我们管理或查询,可以通过数据字典的数据字典( )进行查询获取。
【单选题】Unless you have planted something, you won’t be able to know the pleasure of watching the thing you have planted .
A.
grown
B.
growing
C.
to grow
D.
to be grown
【单选题】More and more people have realized we won't have cleaner water to drink unless something ______ soon. [ ]
A.
was done
B.
will be done
C.
to be done
D.
is done
相关题目：