【名词&注释】
植物群落(plant community)、催产素(oxytocin)、组织液(tissue fluid)、大动脉(large artery)、有利于(beneficial to)、新大陆(new continent)、中缝核群(raphe nuclei)、毛细血管前括约肌(precapillary sphincter)
[判断题]根据植物群落的性质和结构,可将陆地生态系统区分为森林生态系统、草原生态系统、荒漠生态系统、冻原生态系统等。( )
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学习资料:
[单选题]Hardly ______ down ______ the phone rang.
A. had she sat; when
B. she sat; when
C. had she sat; than
D. she had sat; than
[单选题]According to the passage, the first winter of the colonists was hard because______.
A. they had too many enemies
B. the weather was too bad
C. they died from disease
D. they arrived too late to grow crops
[单选题]根据以下选项,回答 105~106 题:
A. 黑质
B. 红核
C. 蓝斑
D. 视上核
E. 中缝核群(raphe nuclei)
F. 第 105 题 可分泌催产素的核团是 ( )
[单选题]下列关于各类血管功能特点的叙述,正确的是( )
A. 毛细血管前括约肌(precapillary sphincter)属于毛细血管前阻力部分;交感缩血管纤维的分布极少、
B. 主动脉和大动脉有弹性贮器的作用;使血液能在血管系统内匀速流动
C. 微静脉口径不变时,微动脉舒张有利于组织液进入血液
D. 静脉的舒缩活动是促使静压血回流入心脏的主要动力
E. 毛细血管分支多,总的截面积大,容纳了循环血量的60%以上
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