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【单选题】
一个角的余角与补角互为补角，则这个角的度数是（ ）A.
45°
B.
60°
C.
75°
D.
90°
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皮皮学刷刷变学霸
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【单选题】地膜覆盖是一种农业栽培技术,具有保温、保水、保肥、改善土壤理化性质的作用,它能提高土壤肥力,抑制杂草生长,减轻病虫害。图中,下左图为大气受热过程图,下右图为北方某地农业景观图。 此读图,完成下面小题。 我国北方农民春播时进行地膜覆盖,可有效地提高地温,其主要原因是
A.
增强①
B.
阻碍②
C.
增强④
D.
减弱③
【简答题】指出下列各题中所给的函数是微分方程的解的是( ):A. B. C.
【判断题】Research expenditure, other than capital expenditure on research facilities, should be recognised as an expense as incurred.Is this statement correct?
A.
正确
B.
错误
【单选题】Which of the following is true when a company pays an expense at the time it was incurred?
A.
The expense account should be increased along with accounts payable.
B.
The expense must be recognized because it was incurred in this accounting period.
C.
The expense cannot be recognized because cash has been paid.
D.
The expense should be recognized evenly over the next year.
【单选题】下列与植物激素有关的叙述,错误的是( ) A .西瓜发育凹凸不平,与种子发育不良合成生长素少有关 B .秋季修剪茶树能增加下年的采摘量,主要原因是修剪能影响生长素的分布 C .植物得“恶苗病”与赤霉素有关,移栽植物的叶片萎蔫主要与乙烯有关 D .早春低温时为了让水稻种子早发芽,可将种子浸泡一段时间,减少脱落酸的含 量
A.
a
B.
b
C.
c
D.
d
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