反映100ml溶液中所含溶质的克数是（） A．摩尔浓度 B．重量比重量百分浓度 C．

属于收付实现制优缺点的有()。

A.实务处理繁琐

B.会计记录直观，便于根据账簿记录来量入为出

C.会计处理简便，不需要对账簿记录进行期末账项调整

D.不能正确计算各期损益

治疗敏感大肠杆菌所致肠道感染且内服不易吸收的药物是（）

A.氟苯尼考

B.黏菌素

C.呋喃唑酮

D.阿莫西林

E.多西环素

如图是生活中一些物质的pH，参照图示判断下列说法正确的是（　　）

A．厨房清洁剂显碱性

B．肥皂是中性物质

C．牛奶的酸性比酱油强

D．胃酸过多的人可多吃橘子

为了证明铜与稀硝酸反应产生NO，某校学生实验小组设计了一个实验，其装置如图所示（加热装置和固定装置均已略去），B为一个用金属丝固定的干燥管，内装块状碳酸钙固体；E为一个空的蒸馏烧瓶；F是用于鼓入空气的双连打气球。

（1） 实验时，先将B装置下移，使碳酸钙与稀硝酸接触产生气体，当C处产生白色沉淀时，立刻将B装置上提，使之与稀硝酸分离。该组学生设计此步操作的目的为               。

（2）将A中铜丝放入稀硝酸中，给装置A微微加热，在装置A中产生无色气体，其反应的化学方程式为                                                        。

（3）装置E中开始时出现浅红棕色气体，用F向E中鼓入空气后，可观察到烧瓶E内气体颜色加深，产生上述现象的原因是                                                。

（4）一段时间后，C中白色沉淀溶解，其原因是________________________       __。

（5）装置D的作用是_________            ___________________________________。

Some families live quite far in the UK．Visiting them can either be an adventure or a chore(麻烦事)．It depends on how much family members like each other．

If all goes well，kids have an exciting time．Your relatives will plan different fun activities and make you happy．Taking you to visit relatives gives your parents a chance to rest．It gives older relatives a good chance to relive the time when they had young kids．If they do not have children of their own，they get to play parent for a while．

I remember that Blackpool Pleasure Beach was the place I liked to go with my grandparents

It is an amusement park on the northwest coast．It is packed with roller coasters(过山车)and candy stalls(糖果摊)．You could race small boats on a lake or scare yourself into death riding the ghost train．I had good memories of my time there．

As you get older，you suddenly become the one who must help your relatives with their kids．I have four COUSINS aged between one and eleven．They are fantastic and I really enjoy seeing them．However，it is very tiring，as they get so excited and energetic(充满活力)．I fall asleep hoping they will remember our good times when they get older．

小题1:If all goes well，visiting relatives far away can be _____for kids．

A．dangerous

B．exciting

C．boring

D．hard小题2:By saying “relive the time”，the author means the old relatives enjoy______．

A．sharing old memories

B．eating lots of food

C．watching old movies

D．going out together小题3:The author feel tired after playing with his cousins because_________．

A．his cousins are funny

B．he enjoys playing with them

C．he doesn’t like children

D．his cousins have too much energy小题4:The best title for this passage is      

A．My Favorite Amusement Park

B．Fun Playing with Cousins

C．Visiting Relatives in the UK

D．Childhood Memories