人体的消化系统把从外界摄取的食物进行物理性、化学性的消化吸a收其营养物质,并将食物残渣排出体外,它是保证人体新陈代谢正常选行的一个重要系统。右图是人体部分消化系统的示意图,下列说法不正确的是() A . ①分泌的消化液中不含消化酶 B . ②内可将蛋白质进行初步消化 C . ③可分泌胰液,通过导管注入小肠 D . ④内的消化液有胃液、肠液和胰液 此题要求改正所给短文中的错误。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 am very thankful you for inviting me to go 1._____________ and stay with you in Nanjing.I often heard that 2.____________ Nanjing is a beautiful city and that I have been 3.____________ longing to see you again so that I can get more help 4.____________ from you in my English study.And I am afraid 5.____________ I can’t come this coming summer vacations.My 6.____________ grandmother, who lives in the country, asked me 7.____________ again and again to go and spending the vacation 8.____________ together with him.She misses me so much that I 9.____________ have no choice but obey her.I wish I could go 10.____________ and see you at the end of this year.