皮皮学，免费搜题
登录
搜题
【单选题】
如果造水机冬季使用时真空度过大,加大热水流量_____。A.
会导致加热面结硬垢
B.
会导致凝水含盐量增大
C.
是一项可取的办法
D.
可以导致安全阀开启
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
【简答题】请结合实例论述同题组合稿件确定主题的思路。
【单选题】We learn from the Pew Research Center that one third of American adult children______.
A.
have parents with no savings and pensions
B.
ignore the emotional needs of their parents
C.
can't afford the daily and medical expenses
D.
spend their own money on their parents' care
【单选题】No decision _ about any future plan until we have done some research into the student preference．
A.
has been made
B.
is made
C.
is being made
D.
will be made
【单选题】_____to his research work, the professor cared little about any other things．
A.
Devoting
B.
Devoted
C.
Having devoted
D.
To devote
相关题目：
参考解析：
知识点：
题目纠错 0
发布
