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【单选题】
关于质点的位移和路程,下列说法中正确的是 ( )A.
位移是矢量，位移的方向就是质点运动的方向
B.
路程是标量，即位移的大小
C.
质点做直线运动时，路程等于位移的大小
D.
位移的大小不会比路程大
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【简答题】好长的铁皮,噢,不!这锯子这么长,锯得动吗?而且,树径还这么长! 上图中被伐到的树,其名称被用来作为美国一家公司名,请问该公司的创始人是?
【单选题】What kind of race is described above?
A.
100-meter race.
B.
Egg-and-spoon race.
C.
Three-legged race.
D.
Sack race.
【单选题】病人,女,48岁。以“慢性肺心病、肺功能失代偿期”入院。入院后给予吸氧、抗生素、强心剂等治疗。病情观察时发现病人出现欣快、兴奋、多言,首先考虑
A.
肺性脑病
B.
氧中毒
C.
脑梗死
D.
洋地黄中毒
E.
病情好转
【单选题】患者,男,50岁,大量饮酒吃肉后,突然腹部剧烈疼痛,并放射至腰背部,查体:上腹中度压痛,腹痛不对称,无腹肌紧张与反跳痛,有轻度腹胀,血清淀粉酶为1200U/L,尿淀粉酶为1000U/L,该患者最可能的诊断是:
A.
急性胃穿孔
B.
急性胆囊炎
C.
急性肠穿孔
D.
急性胰腺炎
【单选题】In a small pilot study, 12 women with endometrial cancer (cancer of the uterus) and 12 women with no apparent disease were contacted and asked whether they had ever used estrogen. Each woman with canc...
A.
Prospective cohort study
B.
Retrospective cohort study
C.
Case-control study
D.
Cross-sectional study
【单选题】患者，男，50岁，大量饮酒吃肉后，突然腹部剧烈疼痛，并放射至腰背部，查体：上腹中度压痛，腹痛不对称，无腹肌紧张与反跳痛，有轻度腹胀，血清淀粉酶为1200U／L，尿淀粉酶为1000U／L，该患者最可能的诊断是（）
A.
急性胃穿孔
B.
急性胆囊炎
C.
急性肠穿孔
D.
急性胰腺炎
E.
原发性腹膜炎
【单选题】What is the kind of communication in which people involved are of the same race but of different ethnic origins?
A.
Interracial communication
B.
Interethnic communication
C.
Intracultural communication
D.
International communication
【单选题】What kind of race in the UK is discussed in the news report ?
A.
Horses compete in how fast they can run.
B.
Horses with riders compete with runners.
C.
Horses riders compete with other horse riders.
D.
Horses compete in how much weight they can carry.
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