问题 选择题

在制作泡菜时,乳酸菌产生的乳酸可以抑制异种微生物的生长,但乳酸积累到一定程度时,又会抑制乳酸菌自身的增殖。这些现象中包括的生态因素有[ ]

A.竞争和种内斗争

B.种内互助、竞争和种内斗争

C.竞争和种内互助

D.种内互助和种内斗争

答案

答案:B

改错题

 短文改错(共l0小题;每小题1分,满分10分)

  此题要求改正所给短文的错误。对标有题号的每一行作出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

  该行多一个词:把多余的词用斜线(\)划掉;在该行右边横线上写出该词,并也用斜线划掉;该行缺一个词:在缺词处加一个漏字符号(∧);在该行右边横线上写出该加的词;该行错一个词,在错的词下划一个横线;在该行右边横线上写出改正后的词。注意:原行没有错的不要改。

I went to see the film after supper.On my way to the                     76.______

cinema.I met an English woman,who lost her way.                          77.______

I gave up the chance see the film and took her to her                    78.______

hotel.While go there,I told her about great changes                          79.______

that had been taken place here in the past few years                          80.______

and she had told me something about her country.                            81.______

Although I missed the film,but I still felt very happy,for                  82.______

I had not only helped her out of trouble but practiced                83.______

my spoken English.If I had not worked hard on                       84.______

English,I would not have been able to help him.                       85.______

多项选择题