种群的性别比例直接影响种群的繁殖力，两性花植物种群的繁殖（　

【名词&注释】

低钾血症(hypokalemia)、心输出量(cardiac output)、舒张压(diastolic blood pressure)、繁殖力、直接影响(directly affect)、两性花(hermaphrodite flower)、打电话(ring up)、大动脉弹性(large artery elasticity)

[单选题]种群的性别比例直接影响种群的繁殖力，两性花^{(hermaphrodite flower)}植物种群的繁殖（　　）

A. 应考虑性别比例问题
B. 不考虑性别比例问题
C. 应考虑育龄雌体数问题
D. 不考虑育龄雌体数问题

查看答案&解析查看所有试题

学习资料：

[单选题]Strayer discourages drivers from talking about business on cell phones while driving because_________．

A. they tend to forget the details of a conversation
B. both the driver and his agent happen to be driving
C. it might not be good for the driver's memory
D. the other passengers would overhear the conversation

[单选题]I want to __________my friendship with her even though I was hurt by her words.

A. separate
B. interrupt
C. maintain
D. release

[单选题]在心输出量不变的情况下，舒张压升高主要是由于 （ ）

A. 心率加快
B. 循环血量增加
C. 大动脉弹性^{(large artery elasticity)}增加
D. 血液黏滞性增大
E. 外周阻力增加

[单选题]长期静脉营养最严重的并发症是( )

A. 高渗性非酮性昏迷
B. 缺水
C. 多尿
D. 低钾血症
E. 低磷血症

[单选题]we moved to the country so that the kids would have a garden ________to play.

A. with which
B. in which
C. for which
D. about which

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