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【单选题】
当消费者对商品X的消费达到饱和点时边际效用为（ ）A.
正
B.
负
C.
0
D.
不确定
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】Fill in the blanks with the expressions learned in this module. Change the form where necessary. 1. The Chinese swimmer was at the beginning of the women ’ s 100-meter freestyle final, but she didn ’ ...
【单选题】欲配制 pH=3 的缓冲溶液 , 从缓冲容量考虑 , 应选用的最佳弱酸是 ( )及其共轭碱。 草酸 (pK θ a1 =1.27) 邻苯二甲酸 (pK θ a1 =2.95) 酒石酸 (pK θ a =4.37) 磷酸 (pK θ a1 =2.12)
A.
草酸
B.
邻苯二甲酸
C.
酒石酸
D.
磷酸
【单选题】欲配制 pH=3 的缓冲溶液 , 从缓冲容量考虑 , 应选用的最佳弱酸是 ( ) 草酸 (pK θ a1 =1.27) 邻苯二甲酸 (pK θ a1 =2.95) 酒石酸 (pK θ a =4.37) 磷酸 (pK θ a1 =2.12)
A.
草酸
B.
邻苯二甲酸
C.
酒石酸
D.
磷酸
【单选题】They _________ letting him go and want him to stay on after his present contract expires.
A.
has an intention of
B.
has no intention of
C.
have an intention of
D.
have no intention of
【单选题】They ________ letting him go and would like him to stay on after his present contract expires.
A.
have not intention of
B.
had no intention of
C.
had an intention of
D.
have an intention of
【判断题】测定乙酸的解离度和解离常数时,配制不同浓度的乙酸溶液,量取乙酸和蒸馏水的体积可以用移液管或者滴定管,但不能使用量筒,因为量筒不能准确量取溶液的体积。
A.
正确
B.
错误
【简答题】They had no intention________letting him go and would like him to stay on after his pesent contract exoires.
【简答题】They had no plan of letting him go.
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