SSR
参考答案:
简单重复序列,又称微卫星DNA,为真核生物所特有。
对炭疽杆菌致病性的叙述错误的是()。
A.荚膜的抗吞噬作用使该菌易于在体内生长
B.致死因子可抑制细胞的生长
C.水肿因子可激活细胞的分泌功能
D.构成炭疽毒素的三种成分:可以各自独立发挥毒性作用
E.炭疽毒素主要损害微血管的内皮细胞
此题要求改正所给短文中的错误。全文共十处错误,每句中最多有两处。错误涉及一个单词的增加、删改或修改。
此句多一个词:把多余的词用斜线(\)划掉。
此句缺一个词:在缺词处加一个漏字符号(∧),在正下方写出该加的词。
此句错一个词:在错的词下划一横线,在该词正下方写出改正后的词。
注意:1.每处错误及其修改只限一词;
2. 只允许修改10处,多者(从第11处起)不计分。
My name is Li Hua. I was born in Hangzhou in February 1977. I started school in 1984 when I am seven. I studied in Guangming Primary School from the years 1984 and 1990. After that I went to the No. 20 MiddleSchool. The main subjects I studied at school including Chinese, maths, English, physics, chemistry or computer.I liked English and computer best and I was very good at it. Last year I had won the first prize in the school computer competition. I have many hobbies now. I enjoy listening popular music and collecting stamps. My favorite sport are swimming in summer and skate in winter.