问题 问答题 简答题

桃树疏花、疏果以什么时期为好?怎样确定留果量?

答案

参考答案:

疏花在花芽露出花瓣(即露红期)后就可进行,一直可持续到开花。一般是将双花掰成单花(即同一节有2朵花的,去一留一),疏花量占总花量的30-50%为宜。疏果在脱萼(俗称脱裤)后进行,最迟在硬核前完成,其间愈早愈好。

通常以结果枝类型确定留果量。一般大果型品种,如大久保、京玉、京艳等,长果枝留2个果,中果枝留1个果,短果枝和花束状果枝留0.3~0.5个果(即2~3果枝留1个果);中果型品种、如苍方早生、早久保等,长、中、短(包括花束状)果枝,可按3、2、1留果;对小果型品种,视其果实大小,各类果枝可适当再多留1~2个果。在具体实施时还应本着强树、强枝多留,弱树弱枝少留的原则灵活掌握。

单项选择题

With the spread of inter-active electronic media a man alone in his own home will never have been so well placed to fill the inexplicable mental space between cradle and crematorium. So I suspect that books will be pushed more and more into those moments of travel or difficult defecation (1) people still don’t quite know what to do with.

When people do read, I think they’ll want to feel they are reading literature, or (2) something serious. (3) you’re going to find fewer books presenting themselves as no- nonsense and (4) assuming literary pretensions and being packaged as works of art. We can expect an extraordinary variety of genre, but with an underlying (5) of sentiment and vision.

Translators can only (6) from this desire for the presumably sophisticated. We can look forward to lots of difficult names and fantastic stories of foreign parts enthusiastically (7) by the overall worship of the "global village" Much of this will be awful and some wonderful, (8) don’t expect the press or the organizers of prizes to offer you much help in making the appropriate distinctions. They will be chiefly (9) in creating celebrity, the greatest enemy of discrimination, but a good prop for the (10) consumer.

Every ethnic grouping over the world will have to be seen to have a great writer--a phenomenon that will (11) a new kind of provincialism, more chronological than geographic, (12) only the strictly contemporary is talked about and (13) . Universities, including Cambridge, will include (14) their literature syllabus novels written only last year. (15) occasional exhumation for the Nobel, the achievements of ten or only five years ago will be largely forgotten.

In short, you can’t go too far wrong when predicting more of the same. But there is a (16) side to this--the inevitable reaction against it. The practical things I would like to see happen--publishers seeking less to (17) celebrity through extravagant advertising, (18) and magazines (19) space to reflective pieces--are rather more improbable than the Second Coming (耶稣复临). But dullness never quite darkens the whole planet. In their own idiosyncratic fashion a few writers will (20) be looking for new departures.

14()

A.at

B.in

C.on

D.for

单项选择题