某同学从定量角度研究过氧化氢溶液制取氧气的过程，对原实验进行部分改进，增加了称量操作．具体做法是：取溶质质量分数为10%的过氧化氢溶液和少量的二氧化锰放入气体发生装置，并对反应前后混合物的质量进行称量，记录如下：

若反应后，双氧水分解完全且氧气全部逸出，试回答：
（1）制得氧气的质量为        克。
（2）请你列式计算所取过氧化氢溶液的质量为多少克？

半径为1的圆中最长的弦长等于​ ____

次北固山下

王湾

客路青山下，行舟绿水前。湖平两岸阔，风正一帆悬。

海日生残夜，江春入旧年。乡书何处达，归雁洛阳边。

阅读下面的文言文，完成下列各题。

    王景文，琅邪临沂人也。祖穆，临海太守。伯父智，有高名，高祖甚重之。父僧朗，亦以谨实见知；薨，谥曰元公。美风姿，好言理，少与陈郡谢庄齐名。太祖甚相钦重，故为太宗娶景文妹，而以景文名与太宗同。高祖第五女新安公主先适太原王景深，离绝，当以适景文，固辞以痰，故不成婚。太宗即位，加领左卫将军。时六军戒严，景文仗士三十人入六门。诸将成云：“平殄小贼，易于拾遗。”景文曰：“敌固无小蜂虿有毒何可轻乎诸军当临事而惧好谋而成先为不可胜乃制胜之术耳。”寻迁丹阳尹，遭父忧，起为冠军将军，尚书左仆射，丹阳尹，固辞仆射。 太宗翦除暴主，又平四方，欲引朝望以佐大业。乃下诏日：“安南将军、江州刺史景文，风度淹粹，理怀清畅，体兼望实，诚备夷岨。宝历方启，密赞义机，妖徒干纪，预毗庙略。景文可封江安县侯，食邑八百户。”景文固让，不许，乃受五百户。时又谓景文在江州，不能洁己。景文与上幸臣王道龙书日：“吾虽寡于行己，庶不负心，既愧殊效，誓不上欺明主。窃闻有为其贝锦者，云营生乃至巨万，素无此能，一旦忽致异术，必非平理。 唯乞平心精检，若此言不虚，便宜肆诸市朝，以正风俗。脱其妄作，当赐思罔昧之由。故以密白，想为中启。”时太子及诸皇子并小，上稍为身后之计，诸将帅吴喜、寿寂之之徒，虑其不能奉幼主，并杀之；而景文外戚贵盛，张永累经军旅，又疑其将来难信，乃自为谣言曰：“一士不可亲，弓长射杀人。”一士，王字；弓长，张字也。景文弥惧，乃自陈求解扬州。时上既有疾，虑一旦晏驾，皇后临朝，则景文自然成宰相，门族强盛，藉元舅之重，岁暮不为纯臣。泰豫元年春，乃遣使送药赐景文死，死时年六十。

（选自《宋书•卷八十五•列传第四十五》，有删节）

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

        Most  people get fired at some point in their careers.Let's explore some things thatmay be causing you to lose your job：

·Not doing your work well

Doyou take pride in your work or do you not care how it turns out? If you aremore interested in simply completing a project than in doing it well, you mayhave just found the root of your problem. ____ If your work is unsatisfying orif you make a lot of mistakes, you will have to change your ways.

· Not completing work on time

Doyou find it difficult to stick to deadlines? As they say, time ismoney.Employees who cannot complete work as quickly as required cause problemsfor their employers.Is it a problem troubling you? ____

· Not getting along well with your coworkers

Areyou always getting into disagreements with your coworkers? ____ Therefore, itwill surely do harm to the business.

· A very quick temper

____If you are unable to manage your anger at work, your boss is likely to see youas a burden.If you can't get your temper in check on your own, you may have toseek professional help.

· A negative attitude

Doyou frequently talk about things you do not like about your employer or workenvironment? Employers don't like workplace negativity. ____ After all, apositive attitude is essential to our career success.

a．Do you get angry very easily?

b．Teamwork create the strong center of agreat team.

c．Do you often complain about your job?

d．You can solve it by improving yourtime management skills.

e．Most bosses do not want to haveemployees with poor work performance.

f．Conflicts in work places lead to lowworking efficiency.

g．Find ways to make improvements withoutbringing everyone else down.