Ig分子的基本结构包含
A.1条重链和1条轻链B.2条重链和1条轻链C.2条相同的重链和2条相同的轻链D.4条相同的肽链E.1条重链和2条轻链
参考答案:C
若直线y=2x+1向下平移n个单位后,所得的直线在y轴上的截距是-2,则n的值是( )
A.1
B.2
C.3
D.4
短文改错(共10小题,每小题1分,满分10分)注意答题规范
Many people find exams frightened experiences. Sit down for an exam when
everyone is so quiet and serious really makes people nervous. In order to overcome
that, I always do few things to relax after I start. At the beginning of the exam, I
read out all the directions carefully so that I can know exactly how I have to do.
Then I work out how many time I can spend on each question and make sure I keep
to my timetable. If I feel myself getting nervous at any time, I will stop what I was
doing and take a few deep breath. However, I think the most important thing is to
review my work thoroughly before exams. The better I’m prepared, the more
worried I will be in exams.