【多选题】People tend to ________ in individualist cultures.
A.
be self-reliant and do their own work as much as possible
B.
maintain harmony and avoid confrontation
C.
depend great on each other and owe loyalty to the group
D.
emphasize personal rights, responsibilities, privacy and innovation
【单选题】Children in individualist societies ______.
A.
are likely to leave home when they become adults
B.
are unlikely to have many playmates
C.
find it difficult to have relationships with other people
D.
think of themselves as members of a group
【单选题】Children in individualist societies _____.
A.
are unlikely to have many playmates
B.
are likely to leave home when they become adults
C.
find it difficult to have relationships with other people
D.
think of themselves as members of a group
【简答题】在 CaSO 4 、 Ca(OH) 2 、 CaC 2 O 4 、 CaCl 2 四种物质中,溶解度最小的估计是 ____________ 。
【单选题】化学反应热不仅与化学反应有关,而且与( )。
【单选题】798 化学反应热不仅与化学反应有关,而且与( )。
【简答题】粗盐提纯的研究. 【有关资料】 化学式 CaCO 3 CaSO 3 CaC 2 O 4 Mg(OH) 2 Ksp 4.96×10 -9 4.96×10 -9 2.34×10 -9 5.61×10 -12 某研究性学习小组对粗盐的提纯和检验进行研究,并提出一些新的方案.已知该粗盐样品中主要含有不溶性杂质、Mg 2+ 、Ca 2+ 等(忽略SO 4 2- 的存在),该小组设计流程如下: 【设计除杂过程...
【单选题】下列说法正确的是 [ ]
A.
电解精炼铜时,阳极泥中含有Zn、Fe、Ag、Au等金属
B.
锅炉中沉积的CaSO 4 可用Na 2 CO 3 溶液浸泡后再用酸溶解去除
C.
饱和Ca(OH) 2 溶液中加入一定量的生石灰,所得溶液的pH会增大
D.
反应NH 3 (g)+HCl(g)=NH 4 Cl(s) △H<0,在任何条件下均能自发进行< /div>
【简答题】下表为部分酸、碱和盐在水中的溶解性.试回答: OH - NO 3 - C1 - CO 3 2- SO 4 2- H + - 溶、挥 溶、挥 溶、挥 溶 Na + 溶 溶 溶 溶 溶 Ca 2+ 微 溶 溶 不 微 Ba 2+ 溶 溶 溶 不 不 Cu 2+ 不 溶 溶 不 溶 (1)CaSO 4 的溶解性______. (2)从右表中找出一种不溶性碱______.(填化学式) (3)NaNO 3 ...