问题 选择题

有一条多肽链由12个氨基酸组成,分子式为CxHyNzQwS(z>12,w>13),这条多肽链经水解后的产物中有5种氨基酸:半胱氨酸(C3H7NO2S)、丙氨酸(C3H6NO2)、天门冬氨酸(C4H7NO4)、赖氨酸(C6H14N2O2)、苯丙氨酸(C9H11NO2)。问水解产物中天门冬氨酸的数目是[ ]

A.(y+12)个

B.(Z+12)个

C.(w+13)个

D.(W-13)/2个

答案

答案:D

改错题

第II卷(非选择题,共35分)

第四部分 写作(共35分)

第一节短文改错(共10小题;每小题1分,满分10分)

假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌的以下作文。文中共有10处语言错误,每句中最多有两处。错误涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(),并在其下面写出该加的词。

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。

On May 25, 1944, Roosevelt was re-elected the President of the United     76.________

States for the four time. A journalist interviewed him and asked, “How     77. _______

do you feel now?” Roosevelt smiled without answering any words, and     78.________

treated the journalist with three small sandwiches. The journalist failed     79. _______

to understand Roosevelt’s point, but felt honor, so he picked              80. ________

up the sandwich to eat. What he wasn’t hungry, he managed to           81. ________

finish all three sandwiches. Roosevelt picked up the 4th sandwich and      82. _______

asked him to eat it as well. The journalist looked embarrassing.           83. ________

So Roosevelt said, “I think I don’t need answer the question you’ve        84. ________

Risen, for you have had your own experience now.”                     85. ________

单项选择题