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【单选题】
采用潜血试验饮食的患者在试验期3日内,应禁食下列哪些食物
A.
奶类食品
B.
猪肝、绿叶蔬菜
C.
黄豆制品
D.
白萝卜菜花
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举一反三
【单选题】Frequently single-parent children take on some of the functions that the absent adult in the house______.
A.
has served
B.
would have served
C.
serves
D.
must serve
【单选题】下列哪项水,电解质失衡容易发生脱水热?
A.
低钾血症
B.
低渗性脱水
C.
高渗性脱水
D.
等渗性脱水
E.
水中毒
【单选题】In order to continue the marriages of the shift workers
A.
wives must learn to care for the children when their husbands are absent
B.
shift work couples must administer their time and activities
C.
wives mustn' t adapt their own feelings of boredom to their husbands' work
D.
all of these
【单选题】王维诗“来日绮窗前,寒梅着花未”表达的是以下哪一种情感?
A.
思乡
B.
感时
C.
伤春
D.
悲秋
【单选题】Which of the following statements about the R and T state of hemoglobin is wrong?
A.
Although oxygen binds to hemoglobin in either state, it has a significantly higher affinity for hemoglobin in the R state. Oxygen binding stabilizes the R state. When oxygen is absent experimentally, the T state is more stable and is thus the predominant conformation of deoxyhemoglobin.
B.
T and R originally denoted “tense” and “relaxed”, respectively, because the T state is stabilized by a lesser number of ion pairs, many of which lie at the α1β2 (and α2β1) interface.
C.
The binding of oxygen to a hemoglobin subunit in the T state triggers a change in conformation to the R state.
D.
When the entire protein undergoes this transition, the structures of the individual subunits change little, but the αβ subunit pairs slide past each other and rotate, narrowing the pocket between the β subunits. In this process, some of the ion pairs that stabilize the T state are broken and some new ones are formed.
【判断题】正向运动学计算比较难,逆运动学计算比较简单
A.
正确
B.
错误
【单选题】 A 37-year-old man infected with HIV for the past 10 years is admitted to the hospital with abdominal pain of 3 days du- ration. Physical examination shows abdominal distention and absent bowel sound...
A.
Cytomegalovirus
B.
Epstein-Barr virus
C.
HIV
D.
Human herpesvirus 8
E.
Human T-cell lymphotropic virus type 1
【单选题】听力原文: In some large American city schools, as many as 20-40% of the students are absent each day. There are two major reasons for such absences: one is sickness, and the other is truancy. That is stay...
A.
12-14%
B.
12-40%
C.
20-40%
D.
20-50%
【简答题】Jane was not a good student. Her head was in the clouds(处于幻想之中) most of the time. She wanted to listen in class, but other things seemed more important: her clothes, her hairstyle, films and televisio...
【简答题】单词拼写。 1. His illness a_________ for his being absent from work. 2. I climbed into bed and p____ the blanket over my head. 3. Darwin's t_____ of evolution(进化)is based on the survival of the fittest. 4....
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