增加：在缺词处加一个漏字符号（∧），并在此符号下面写出该加的词。

删除：把多余的词用斜线（＼）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1.每处错误及其修改均仅限一词；2.只允许修改10处，多者（从第11处起）不计分。

    Everyone needs help.Often there are some cases that we help ourselves indirect in helping others.Last month, Tom asked for me to help him with his math.In order to help him,I go over the textbook again and again,and did lots of exercises.To his surprise,some difficult problems that I could not understand before worked out by myself.After a month,with my help,Tom made great progresses in math,too.Such a experience enabled me to realize that help others also does good to ourselves.So when others is in trouble,never hesitate to help them.

【甲】答谢中书书

    山川之美，古来共谈。高峰入云，清流见底。两岸石壁，五色交辉。青林翠竹，四时俱备。晓雾将歇，猿鸟乱鸣；夕日欲颓，沉鳞竞跃。实是欲界之仙都。自康乐以来，未复有能与其奇者。

【乙】与朱元思书

    风烟俱净，天山共色。从流飘荡，任意东西。自富阳至桐庐一百许里，奇山异水，天下独绝。

    水皆缥碧，千丈见底。游鱼细石，直视无碍。急湍甚箭，猛浪若奔。

    夹岸高山，皆生寒树，负势竞上，互相轩邈，争高直指，千百成峰。泉水激石，泠泠作响；好鸟相鸣，嘤嘤成韵。蝉则千转不穷，猿则百叫无绝。鸢飞戾天者，望峰息心；经纶世务者，窥谷忘反。横柯上蔽，在昼犹昏；疏条交映，有时见日。

电流是表示电流强弱的物理量，用符号____ 表示，国际单位是____ ，用符号____ 表示；测量电流强弱的仪表叫____ ，用符号____ 表示，实验室的电流表一般有____ 和____ 个量程．