皮皮学，免费搜题
登录
搜题
【多选题】
可以增强混悬剂的稳定性的方法有()A.
加人亲水性高分子物质
B.
加入单糖浆
C.
加入电解质
D.
加人增溶剂
E.
使用胶体磨进行分散
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
【单选题】My father _________ Beijing many times. He _________ there again last week.
A.
has been to; has gone
B.
has gone to; went
C.
has been in; has gone
D.
has been to; went
【单选题】My father _____ to America. He _____ there three months ago. [ ]
A.
went; has been
B.
has been; has gone
C.
has gone; went
D.
has went; went
【单选题】My father _________to South Hill．He______ there for 5 days．
A.
has gone：has been
B.
has been; has gone
C.
has gone；has gone
D.
has been；has been
【单选题】抽样调查法，是指从研究对象的全部单位中抽取一部分进行考察和分析，并用这部分的数量特征去推断总体的数量特征的一种调查方法，有随机抽样和非随机抽样两种。下列属于非随机抽样形式的是（）。
A.
等距抽样
B.
整群抽样
C.
判断抽样
D.
分层抽样
【单选题】My father______ Australia for a year. And he enjoys staying there.
A.
has been in
B.
has been to
C.
has gone to
D.
went to
【单选题】My dad __________ Singapore for a meeting. He ________ there twice.
A.
has gone to, has been to
B.
has been to, has gone to
C.
has gone to, has been
D.
has been to, has gone
相关题目：
参考解析：
知识点：
题目纠错 0
发布
