【单选题】下列配位化合物中,一般称为复盐的是 ( )。
B.
(NH 4 ) 2 SO 4 · FeSO 4 · 6H 2 O
C.
K 3 Fe(C 2 O 4 ) 3 · 3H 2 O
【判断题】藏族佛教徒遇到寺院、嘛尼堆、佛塔等佛教设施,都必须下马并从右向左绕行。
【单选题】Prof. Hogworth’s major_______ interest is the common characteristics shared by twins.
【简答题】A.Many students find Prof. Johnson's lectures boring. B.Few students understand Prof. Johnson's lectures. C.Many students have dropped Prof. Johnson's class. D.Few students meet Prof. Jonson's require...
【简答题】Prof. Hogworth's major________ interest is the common characteristics shared by twins. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
【单选题】2008年初,南方经历了50年一遇的大雪灾,导致交通中断,电网大面积瘫痪.为了打通京珠高速,有关部门在京珠高速上撒下了数千吨融雪剂帮助破冰除雪,恢复交通.融雪剂主要分为两大类,一类是以醋酸钾为主要成分的有机融雪剂,虽然这一类融雪剂融雪效果好,没有什么腐蚀损害,但它的价格太高,一般只适用于机场等地.而另一类则是氯盐类融雪剂,包括氯化钠、氯化钙、氯化镁、氯化钾等,通称作“化冰盐”.它的优点是便宜,价格...
A.
通过在熔融状态下能否导电来证明CaCl 2 是否为离子化合物
B.
CaCl 2 通常用作干燥剂,但是不能干燥NH 3
D.
“化冰盐“可以替代食盐来作调味剂,氯盐类融雪剂不会造成地下水污染
【简答题】A.Few students understand Prof. Johnson's lectures. B.Few students meet Prof. Jonson's requirements. C.Many students find Prof. Johnson's lectures boring. D.Many students have dropped Prof. Johnson's ...
【单选题】下列化合物中,一般称为复盐的是( )。
B.
(B) (NH 4 ) 2 SO 4 •FeSO 4 •6H 2 O
C.
(C) K 3 Fe(C 2 O 4 ) 3 •3H 2 O
【简答题】— Could I talk to Prof. Lee?— _________________.A: Oh, it's youB; Yes, speakingC; I&— Could I talk to Prof. Lee? — _________________. A: Oh, it's you B; Yes, speaking C; I'm waiting for you