血中氧分压降低导致呼吸加强的原因是直接兴奋（　　）

【名词&注释】

输卵管(oviduct)、自由自在(lightheartedness)、中枢化学感受器(central chemoreceptor)、氧分压降低(oxygen partial pressure)

[单选题]血中氧分压降低^{(oxygen partial pressure)}导致呼吸加强的原因是直接兴奋（　　）

A. 延髓呼吸中枢
B. 呼吸调整中枢
C. 外周化学感受器
D. 中枢化学感受器
E. 肺牵张感受器

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学习资料：

[单选题]_________

根据以下内容，回答下面的题目。Insure means to protect _51_ a loss of money．Most people can budget their money so that their income will cover expected expenses _52_ food, clothing, housing, and public services．But, there is no way to know _53_ who will suffer a crisis (危机) such as a serious illness, fire, flood, or a car accident．Such crises usually _54_ great expense．Even if people could predict crises, it would be hard to save enough money to _55_ the expenses．Insurance is a system _56_ a company collects money from many individuals and then pays certain expenses whenever one of those insured individuals is faced with a certain crisis．An insurance policy _57_ how much the insurance costs and how much the company will pay when a policy holder is faced with a certain crisis．There are many different kinds of insurance, _58_ hospital, motor-car and fire．Insurance can be rather expensive but most people buy insurance of some kinD．Insurance is something _59_ people buy and hope they will _60_ need．_________

A. include
B. including
C. as well as
D. also

[单选题]依次填人下列句子中最恰当的一组词是 (　　)①嗜血成性的敌人仗着他们人多，工事坚固，一步不退，拼命______ 。 ②一个老农捧起一把泥土，仔细______，想鉴定它究竟适宜种植什么谷物和蔬菜。 ③下午便得到噩耗，说是卫队居然开枪，死伤至数百人，而刘和珍在______之列。 ④掐线工人心里有谱，不用在铜胎上打稿，就能______地粘成图画。

A. 抵抗 端详 遇难 随意驱遣
B. 抵抗 审度 遇害 自由自在
C. 顽抗 审度 遇难 自由自在
D. 顽抗 端详 遇害 随意驱遣

[多选题]输卵管 （　　）

A. 属腹膜内位器官
B. 为一对细长而弯曲的肌性管道
C. 位于子宫底的两侧
D. 包裹在子宫阔韧带上缘内
E. 借输卵管腹腔口开口于腹腔

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