影响嫁接苗成活率的因素主要有哪些？_爱下问搜题

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问题问答题简答题

影响嫁接苗成活率的因素主要有哪些？

答案

参考答案：

一是接穗与砧木的亲和力，即接穗和砧木嫁接以后愈合及生长发育能力；二是接穗与砧木的生活力，健壮幼苗，生活力强，嫁接成活率高；三是环境条件的影响，适温高温与遮阳是嫁接成活的重要条件，四是嫁接技术水平。

完形填空

完形填空（共20小题，每小题1.5分，满分30分）
阅读下面短文，掌握其大意，然后从下列各题所给的四个选项(A、B、C和D)中，选出最佳选项.
As a young reporter, Sparky asked Lu Haoting, a business reporter from China Daily, for help on interviewing．He found that interviewing people is not as 1 as just asking questions．To his 2 , journalists also need to do a lot of homework 3 an interview．
Lu shared her 4 of a recent interview with the president of Boeing China, David Wang, with Sparky．
There are two 5 of interviews, inclusive （群访） and exclusive （专访）．The inclusive interview is 6 in the form of a press conference．
In a（n） 7interview, only you and the interviewee talk 8 ．You need to 9 all your questions for both types of interviews 10 ．
" 11 you don’t prepare, you will ask some silly questions and 12 your time," Lu said．
"I wanted to know Boeing’s new strategy in the Chinese market．13 I checked out over 20 reports from different newspapers about Boeing and its rival, Airbus," Lu said．She also found useful 14 about the two companies on their websites．
On many occasions, interviewees 15 journalists to provide a question list in advance of an interview．In order to 16 a proper objective story Lu also interviewed some 17 to get their comments on Boeing’s performance in China．
18 her interview with David Wang only lasted about half an hour, her 19 helped her to ask many good questions about Boeing’s development in China．
"After a successful interview, you always find all that homework was really 20 it," Lu told Sparky．

A．interesting

D．interactive

B．disappointment

A．side by side

D．face to face

B．information

C．businessmen

填空题

糖尿病性视网膜病变是糖尿病最严重的并发症之一，其发生率与糖尿病的________、________、________、________有关，10%的糖尿病患者在起病________年左右发生眼底改变。