Questions 7 to 10 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. What did recent photographs from a space satellite indicate
A. The surface of the ocean is expanding.
B. Volcanic activity is increasing.
C. The surface of Earth contains tons of cosmic dust.
D. Thousands of comets are colliding with Earth’s atmosphere.
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男性,32岁,饱食后突感右上腹部剧痛,迅速转移到右下腹和下腹部,伴恶心,呕吐不能 减轻腹痛。发病6小时来院急诊,体检:痛苦貌,血压90/60mmHg,脉搏120次/分,全腹肌紧张、压痛、反跳痛,以上腹和右上腹部为显著,肠鸣音消失,肝浊音界存在,白细胞16×109/L,中性粒细胞0.9。 最可能的诊断是
A. 肠扭转
B. 十二指肠溃疡急性穿孔
C. 急性胆囊炎伴穿孔
D. 急性胰腺炎
乙型脑炎时出现
A. 凝固性坏死
B. 干酪样坏死
C. 液化性坏死
D. 溶解坏死
SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. What was Clarence Birdseye surprised to learn
A fish could survive being frozen.
B. The fish were easier to catch in the winter.
C. Food can be kept frozen indefinitely.
D. Solutions that freeze slowly form large crystals.
女性,42岁,乏力、面色苍白、尿色黄1年。重度贫血貌,巩膜轻度黄染,肝、脾肋下未触 及。血清总胆红素27μmol/L,非结合胆红素19μmol/L,肝功能正常。尿潜血(+++)。血红蛋白55g/L,白细胞3.5×109/L,平均红细胞体积70fl,血小板72×109/L。骨髓象:中幼+晚幼红细胞66%,网织红细胞9%。 该患者进一步检查结果:CD55-红细胞为33%,CD59-红细胞28%,铁蛋白9μg/L。 该患者的病因为
A. 自身免疫性溶血性贫血
B. 海洋性贫血
C. 阵发性睡眠性血红蛋白尿
D. 微血管病性溶血性贫血