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【简答题】
1 土壤有机质在土壤肥力和生态环境中有哪些重要作用? 2 为什么说团粒结构是肥沃土壤的标志? 3 土壤质地与土壤机械组成有什么关系? 4 利用土 壤质地三角形 查找土壤质地练习。 下 图是国际制土壤质地分类三角图 , 如果甲试验场的土壤质地为砂粒 ( 60% ) 、 粉粒 ( 25% ) 、 黏粒 ( 15% ) , 请判别甲试验场的土壤属砂质 黏壤土、黏质壤土、壤土、粉质黏壤土等中的哪一类型 ? 5 阐述土壤质地对肥力的影响,哪种质地对土壤肥力更有利?
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举一反三
【单选题】------Tony, are you listening to me ？ ------Sorry sir, I to understand what you said just now.
A.
try
B.
was trying
C.
tried
D.
have tried
【单选题】_____ I cannot understand is _____ she wants to resign her present job.
A.
What; why
B.
Which; how
C.
That; why
D.
What; which
【单选题】______, I've never seen anyone who's as capable as Kate. [ ]
A.
As long as I have travelled
B.
Now that I have travelled so much
C.
As I have travelled much
D.
Much as I have travelled
【单选题】Jenny is always absent from school, I suppose is why she is criticized now and then.
A.
who
B.
which
C.
that
D.
what
【单选题】患者,女性,21岁,发生车祸后被120急救车送至急诊科,神志清醒,呼吸急促,主诉“方向盘曾经撞击胸部,自觉胸部不适与疼痛。接诊护土应首先评估该患者的
A.
气道和颈椎
B.
呼吸功能
C.
循环功能
D.
神志状况
E.
潜在损伤情况
【单选题】. ---You were brave enough to raise objections at the meeting. ---Well, now I regret ___________ that.
A.
to do
B.
to be doing
C.
to have done
D.
having done
【单选题】.________, I have never seen anyone who’s as capable as John.
A.
As long as I have traveled
B.
Now that I have traveled too much
C.
Much as I have traveled
D.
As I have traveled too much
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