皮皮学，免费搜题
登录
搜题
【单选题】
铁吸收率测定的参考值为A.
5%-10%
B.
10%-35%
C.
35%-50%
D.
45%-60%
E.
60%-75%
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【多选题】Read the following paragraph and choose those correct statements. In recent decades, cities have grown so large that now about 50% of the Earth's population lives in urban(城市的) areas. There are sever...
A.
This is a cause paragraph. It explains three reasons for urbanization.
B.
One of the causes of urbanization is "factory jobs attracted people".
C.
One of the causes of urbanization is "places of leisure, entertainment, and culture made city life appear more interesting".
D.
One of the causes of urbanization is "better schools attracted families to move to the city".
【简答题】The more I look 1 me, the more self-employment seems to be the way to go for many people. I’m not sure if this is just my 2 or it's indeed a global phenomenon, so I'd like to discuss it with you. In m...
【简答题】Scientists today are greater effort to study ocean currents(洋流). Most do it using satellites and other high-tech equipment. However, ocean expert Curtis Ebbesmeyer does it in a special way-by s...
【单选题】按照观察过程的结构性质与控制程度,可以将观察分为( )。
A.
参与观察与非参与观察
B.
正式观察与非正式观察
C.
直接观察与间接观察
D.
描述观察、取样观察与评定观察
【单选题】— Why do you look sad? — There are so many problems ________. [ ]
A.
remaining to settle
B.
remained settling
C.
remaining to be settled
D.
remained to be settled
【简答题】社会调查研究应遵循的基本原则是：（）。
【简答题】Text Trouble Cell phone calling plans that allow users to send unlimited text messages are popular with s across the United States. In 2008, an average American sent 2,272 text messages each ...
相关题目：
参考解析：
知识点：
题目纠错 0
发布
