直接材料价格差异

短文改错(共10小题，每小题1分，满分10分)

假如英语课上老师要求同学们交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，要求你在错误的地方增加、删除、或修改某个单词。

增加：在缺词处加一个漏字符号（∧），并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1. 每次错误以及修改均限一词； 2. 只允许修改10处，多者从第十一处起不计分

例如：It was very nice to get your invitation to spend ∧ weekend with you. Luckily I was     

the                         am

completely free then, so I’ll to say “yes”. I’ll arrive in Bristol at around 8 p.m. in Friday evening

on

A Frenchman was once visiting London．He wished to take a walk to see a city．But he was afraid he might get lost because he knew no words of English．So before he left his hotel, he stopped in the first corner and carefully copied in his notebook the names of the street that he was staying．Then he walked on．At last, he gets lost．After several hours he found a policeman．The Frenchman tried his best to explain the policeman that he didn’t know the name of his hotel, and he knew the name of the street．He then showed the policeman that he copied in his notebook．It was read: “One-way street”．

DNA测序系统可用于（）

A.DNA序列测定

B.杂合子自动检测

C.基因表达

D.序列比较

E.AFLP指纹图谱

用所给单词的适当形式填空。

①I have many____(friend) here. 

②My brother____(have)a basketball.

③_____ Tom _____  (have) an English book? 

④Let's _____ (play) ping-pong ball. 

⑤Please bring the math book to____(I).

1950年4月，毛 * * 任命许光达担任哪个部队司令员？

在国际收支平衡表中，若储备资产是负号，则表示（）。

A.储备资产减少

B.储备资产未变化

C.储备资产增加

D.储备资产赤字