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【单选题】
中职生小李染上了烟瘾,但在班主任的悉心教导下,意识到抽烟是一个不良习惯并且决定戒烟,培养良好的习惯,请问他此时处于以下哪个阶段(C)A.
不良习惯的无意识阶段
B.
不良习惯的有意识阶段
C.
良好习惯的有意识阶段
D.
良好习惯的无意识阶段
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举一反三
【简答题】They letting him go and would like him to stay on after his present contract expires.
【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
【简答题】They had no intention________letting him go and would like him to stay on after his pesent contract exoires.
【单选题】磷酸 pK a 1、 pK a 2、 pK a 3 分别为2.12、7.20、12.36,在pH=1.0的磷酸溶液中,磷酸的主要存在形体为( )
A.
磷酸根
B.
磷酸一氢根
C.
磷酸二氢根
D.
磷酸分子
【简答题】They had no plan of letting him go.
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