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【判断题】
对油菜产量影响最大的 因 面 积角果数。
A.
正确
B.
错误
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举一反三
【单选题】The data on U.S. growth rates during the last half of the 20 th century suggest that when the savings rate increases
A.
the rate of growth can increase or decrease depending on the phase of the business cycle the economy is in.
B.
the rate of economic growth increases.
C.
the rate of economic growth decreases.
D.
the rate of economic growth is unaffected.
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【单选题】The savings on last year’s purchases alone would have _____ $6,987.
A.
amounted to
B.
reach
C.
more
D.
over
查看完整题目与答案
【单选题】下列有关“一枝黄花”的叙述中正确的是()。
A.
“ 一枝黄花”属于外来物种，进入我国后可以增加我国生物多样性
B.
“ 一枝黄花”的成灾最可能的原因是本地缺乏其天敌
C.
为控制“一枝黄花”可以再从原产地引进其天敌
D.
观赏植物“一枝黄花”进入我国后的种群增长曲线为S型曲线
查看完整题目与答案
【多选题】在其他条件不变的情况下，减小分子的碰撞截面，有助于以下哪种输运过程的发生？
A.
动量传递（粘滞）
B.
热量传递（热传导）
C.
质量传递（扩散）
D.
其他三个选项都不对
查看完整题目与答案
【单选题】Lester had $6,270 in his savings account at the beginning of this year. This amount includes both the $6,000 he originally invested at the beginning of last year plus the $270 he earned in interest la...
A.
simple interest.
B.
interest on interest.
C.
discounted interest.
D.
compound interest.
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【单选题】Toni adds $5,000 to her savings on the first day of each year. Tim adds $5,000 to his savings on the last day of each year. They both earn a 9% rate of return. What is the difference in their savings ...
A.
$55,822.73
B.
$56,803.03
C.
$58,911.21
D.
$61,338.40
E.
$65,115.27
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【单选题】Jamie earned $180 in interest on her savings account last year. She has decided to leave the $180 in her account so that she can earn interest on the $180 this year. The interest Jamie earns this year...
A.
simple interest.
B.
complex interest.
C.
accrued interest.
D.
interest on interest.
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【单选题】Nadine is retiring at age 62 and expects to live to age 85. On the day she retires, she has $402,000 in her retirement savings account. She is somewhat conservative with her money and expects to earn ...
A.
$1,909.92
B.
$2,147.78
C.
$2,219.46
D.
$2,416.08
E.
$2,688.77
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【单选题】Tom earned $120 in interest on his savings account last year. Tom has decided to leave the $120 in his account so that he can earn interest on the $120 this year. This process of earning interest on p...
A.
discounting.
B.
compounding.
C.
duplicating.
D.
multiplying.
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【单选题】趋同适应，是指亲缘关系相当疏远的不同种类的生物，由于长期生活在相同或相似的环境中，接受同样生态环境选择，只有能适应环境的类型才得以保存下去。趋异适应，是指同种生物如长期生活在不同条件下，为了适应所在的环境，会在外形、习性和生理特征方面表现出明显差别。 根据上述定义，下列属于趋同适应的是（ ）
A.
蓖麻在我国北方是一年生的草本植物，而在南方却是呈树状的多年生植物
B.
草食性鱼类的粪便可促进蜉蝣生物的繁殖，为鲢鱼、鳙鱼等滤食性鱼类可使水质变清，有利于草食性鱼类的生活
C.
北极熊由棕熊进化而来，皮衣为白色，与北极的环境颜色相同，有利于捕食，肩部呈流线型，足撑有刚毛，可使其在冰上行走而不滑倒
D.
哺乳类的鲸、海豚、海象、海豹，鱼类的鲨鱼，它们都在亲缘关系上相距甚远，但都长期生活在海洋中，整个身体成为适应于游泳的纺锤形
查看完整题目与答案
相关题目：
【单选题】The data on U.S. growth rates during the last half of the 20 th century suggest that when the savings rate increases
A.
the rate of growth can increase or decrease depending on the phase of the business cycle the economy is in.
B.
the rate of economic growth increases.
C.
the rate of economic growth decreases.
D.
the rate of economic growth is unaffected.
查看完整题目与答案
【单选题】The savings on last year’s purchases alone would have _____ $6,987.
A.
amounted to
B.
reach
C.
more
D.
over
查看完整题目与答案
【单选题】下列有关“一枝黄花”的叙述中正确的是()。
A.
“ 一枝黄花”属于外来物种，进入我国后可以增加我国生物多样性
B.
“ 一枝黄花”的成灾最可能的原因是本地缺乏其天敌
C.
为控制“一枝黄花”可以再从原产地引进其天敌
D.
观赏植物“一枝黄花”进入我国后的种群增长曲线为S型曲线
查看完整题目与答案
【多选题】在其他条件不变的情况下，减小分子的碰撞截面，有助于以下哪种输运过程的发生？
A.
动量传递（粘滞）
B.
热量传递（热传导）
C.
质量传递（扩散）
D.
其他三个选项都不对
查看完整题目与答案
【单选题】Lester had $6,270 in his savings account at the beginning of this year. This amount includes both the $6,000 he originally invested at the beginning of last year plus the $270 he earned in interest la...
A.
simple interest.
B.
interest on interest.
C.
discounted interest.
D.
compound interest.
查看完整题目与答案
【单选题】Toni adds $5,000 to her savings on the first day of each year. Tim adds $5,000 to his savings on the last day of each year. They both earn a 9% rate of return. What is the difference in their savings ...
A.
$55,822.73
B.
$56,803.03
C.
$58,911.21
D.
$61,338.40
E.
$65,115.27
查看完整题目与答案
【单选题】Jamie earned $180 in interest on her savings account last year. She has decided to leave the $180 in her account so that she can earn interest on the $180 this year. The interest Jamie earns this year...
A.
simple interest.
B.
complex interest.
C.
accrued interest.
D.
interest on interest.
查看完整题目与答案
【单选题】Nadine is retiring at age 62 and expects to live to age 85. On the day she retires, she has $402,000 in her retirement savings account. She is somewhat conservative with her money and expects to earn ...
A.
$1,909.92
B.
$2,147.78
C.
$2,219.46
D.
$2,416.08
E.
$2,688.77
查看完整题目与答案
【单选题】Tom earned $120 in interest on his savings account last year. Tom has decided to leave the $120 in his account so that he can earn interest on the $120 this year. This process of earning interest on p...
A.
discounting.
B.
compounding.
C.
duplicating.
D.
multiplying.
查看完整题目与答案
【单选题】趋同适应，是指亲缘关系相当疏远的不同种类的生物，由于长期生活在相同或相似的环境中，接受同样生态环境选择，只有能适应环境的类型才得以保存下去。趋异适应，是指同种生物如长期生活在不同条件下，为了适应所在的环境，会在外形、习性和生理特征方面表现出明显差别。 根据上述定义，下列属于趋同适应的是（ ）
A.
蓖麻在我国北方是一年生的草本植物，而在南方却是呈树状的多年生植物
B.
草食性鱼类的粪便可促进蜉蝣生物的繁殖，为鲢鱼、鳙鱼等滤食性鱼类可使水质变清，有利于草食性鱼类的生活
C.
北极熊由棕熊进化而来，皮衣为白色，与北极的环境颜色相同，有利于捕食，肩部呈流线型，足撑有刚毛，可使其在冰上行走而不滑倒
D.
哺乳类的鲸、海豚、海象、海豹，鱼类的鲨鱼，它们都在亲缘关系上相距甚远，但都长期生活在海洋中，整个身体成为适应于游泳的纺锤形
查看完整题目与答案