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【单选题】
三元液-液萃取中,若组分 B 、 S 完全不互溶,则萃取的选择性系数 ( )
A.
等于 0
B.
等于 1
C.
趋于无穷大
D.
大于0而小于1
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参考答案：
举一反三
【多选题】下面哪些属于艾滋病自愿咨询检测VCT自愿咨询的内容?()
A.
检测前咨询
B.
检测后咨询
C.
预防性咨询
D.
支持性咨询
查看完整题目与答案
【单选题】目前公认的必需脂肪酸是:
A.
亚麻酸和花生四烯酸
B.
亚油酸
C.
亚油酸和а亚麻酸
D.
а亚麻酸
E.
花生四烯酸
查看完整题目与答案
【简答题】带分数的倒数应该怎么找？整数的倒数怎么找？
查看完整题目与答案
【单选题】— When _____________ you come to China? — I came on Tuesday. [     ]
A.
did
B.
do
查看完整题目与答案
【单选题】—When did you uncle arrive China? — He got to Guangzhou _______ the morning of April 16 th .
A.
at; in                    
B.
in; in                 
C.
in; on
查看完整题目与答案
【单选题】必须从食物中摄取的脂肪酸称为必需脂肪酸，目前公认的必需脂肪酸是()。
A.
油酸
B.
亚油酸
C.
软脂酸
D.
硬脂酸
查看完整题目与答案
【单选题】— When did Tom come to Qingdao？ — It was in July，2006 and he a trip in China with his parents at that time.
A.
would take
B.
had taken
C.
was taking
D.
had been taking
查看完整题目与答案
【简答题】以下程序从键盘输入20个整数存入数组，统计输入非负数的个数，并计算输入的非负整数之和。 #include'stdio.h' main() {int i，a[20]，s，n； s=n=0： for(i=0；i＜20；i++)scanf('%d'，＆a[i]) for(i=0；i＜20；i++) {if(a[i]＜0)break； S+=a[i]；n++； } printf('s=%d/t，n=%d/...
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【单选题】— ______ did your aunt leave China? — She ______ for three years. [     ]
A.
When; has left
B.
When; has been away
C.
How long; has left
D.
How long; has been away
查看完整题目与答案
【单选题】—Could you tell me _______? —Of course, last night. [     ]
A.
when you reached China
B.
when did you reach China
C.
how you came to China
D.
how did you come to China
查看完整题目与答案
相关题目：
【多选题】下面哪些属于艾滋病自愿咨询检测VCT自愿咨询的内容?()
A.
检测前咨询
B.
检测后咨询
C.
预防性咨询
D.
支持性咨询
查看完整题目与答案
【单选题】目前公认的必需脂肪酸是:
A.
亚麻酸和花生四烯酸
B.
亚油酸
C.
亚油酸和а亚麻酸
D.
а亚麻酸
E.
花生四烯酸
查看完整题目与答案
【简答题】带分数的倒数应该怎么找？整数的倒数怎么找？
查看完整题目与答案
【单选题】— When _____________ you come to China? — I came on Tuesday. [     ]
A.
did
B.
do
查看完整题目与答案
【单选题】—When did you uncle arrive China? — He got to Guangzhou _______ the morning of April 16 th .
A.
at; in                    
B.
in; in                 
C.
in; on
查看完整题目与答案
【单选题】必须从食物中摄取的脂肪酸称为必需脂肪酸，目前公认的必需脂肪酸是()。
A.
油酸
B.
亚油酸
C.
软脂酸
D.
硬脂酸
查看完整题目与答案
【单选题】— When did Tom come to Qingdao？ — It was in July，2006 and he a trip in China with his parents at that time.
A.
would take
B.
had taken
C.
was taking
D.
had been taking
查看完整题目与答案
【简答题】以下程序从键盘输入20个整数存入数组，统计输入非负数的个数，并计算输入的非负整数之和。 #include'stdio.h' main() {int i，a[20]，s，n； s=n=0： for(i=0；i＜20；i++)scanf('%d'，＆a[i]) for(i=0；i＜20；i++) {if(a[i]＜0)break； S+=a[i]；n++； } printf('s=%d/t，n=%d/...
查看完整题目与答案
【单选题】— ______ did your aunt leave China? — She ______ for three years. [     ]
A.
When; has left
B.
When; has been away
C.
How long; has left
D.
How long; has been away
查看完整题目与答案
【单选题】—Could you tell me _______? —Of course, last night. [     ]
A.
when you reached China
B.
when did you reach China
C.
how you came to China
D.
how did you come to China
查看完整题目与答案
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