【名词&注释】
佐治亚州(georgia state)、毛细血管(capillary)、有机磷杀虫药(organophosphorous pesticide)、脑血管(cerebrovascular)、滑车神经(trochlear nerve)、公共汽车(bus)、血浆胶体渗透压(colloidal osmotic pressure)、静水压(hydrostatic pressure)、公交公司(bus company)、亚特兰大市(atlanta city)
[单选题]止于下颌颈的肌是（ ）
A. 翼内肌
B. 咬肌
C. 颞肌
D. 翼外肌
E. 颊肌
回答下面的题目 American Blacks experienced a revolution after 1945, a revolution in expectations． Following World War Ⅱ , the steady movement toward first-class citizenship for Black people quickened, with significant actions taking place in courts of law, in voting booths, in restaurants and in the streets of the nation． A decade of intense civil rights activity was launched in 1954 when the United States Supreme Court declared segregated schools to be unconstitutional． In 1955, Dr． Martin Luther King, Jr． , effectively organized the Blacks of Atlanta, Georgia, in a bus boycott． The boycott lasted two years, and when it was over, Blacks no longer were degraded by being forced to sit or stand in the rear of buses． In 1960, a group of Black college students decided that they, as well as white persons, had the right to eat at a lunch counter in Greensboro, North Carolina． This sit-in sparked an aggressive national movement and, in the next few years, thousands of young men and women--Black and White, North and South--overturned local laws and customs that had maintained segregation． Sit-ins, pray-ins, freedom rides, freedom marches and demonstrations to open all schools to Black children took place across the nation．Several important actions took place to change the status of black people
根据以下内容，回答下面的题目。Researchers have found that REM (rapid eye movement) sleep is important to human beings．This type of sleep generally occurs four or five times during one night of sleep lasting five minutes to forty minutes for each occurrence．The deeper a person’s sleep becomes, the longer the periods of rapid eye movement．There are physical charges in the body to show that a person has changed from NREM (non-rapid eye movement) to REM sleep．Breathing becomes faster, the heart rate increases, and, as the name implies, the eyes begin to move quickly．Accompanying these physical changes in the body is a very important characteristic of REM sleep．It is during REM sleep that a person dreams．According to the passage, how often does REM sleep occur in one night?
根据以下选项，回答下面的题目：A．虹膜 B．脉络膜 C．巩膜 D．角膜 E．睫状体 构成眼球壁血管膜后部的是 （ ）
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