空腹病人胆囊不显示最常见的原因是 （ ） A．胆汁淤积 B．胆囊颈管阻塞 C．胆囊

单词拼写 根据所给汉语或英语首字母写出短文中所缺英语单词的正确形式。（共10个小题，每小题0.5分）

Last week, my friends and I talked about the rules in our school. Here are some of our ideas.

At our school, we have to wear uniforms every 小题1:d______. The problem is that all my classmates think the uniforms are 小题2:丑的______.We think young people should 小题3:l______ smart and so we would like to wear our own clothes. Our teachers believe that if we did that, we would concentrate more on our clothes than our studies. We don’t小题4:同意________.We would feel more comfortable and that is 小题5:g______ for studying. If we can’t do that, we should be小题6:允许__________to design our own uniforms. That would be a good way to keep both teachers and 小题7:学生___________ happy.

Besides, vacations should be longer. At present they’re too小题8:s______. Longer vacations would give us time to do things like volunteering. Last summer I had a(n) 小题9:机会_________ to volunteer at the local hospital,小题10:b________ I couldn’t because I had to go back to school.

男，7岁，2岁时因头痛而就诊，MRI示脑积水、颅内（小脑蚓部及蝶鞍）见多发恶性肿瘤，临床诊断为髓母细胞瘤。未行手术治疗，多年来一直行放、化疗治疗，最后一次化疗1个月前结束。因腹胀、恶心、呕吐1周而就诊，CT示：双侧侧脑室充满肿瘤病灶，PET/CT全身显像如图。正确的描述是（）。

A.肿瘤复发并沿双侧侧脑室弥漫性浸润

B.肿瘤同时向双侧丘脑及豆状核浸润、侵犯；蝶鞍内块状高代谢病灶，考虑为转移灶

C.脑干及颈段、胸段、上腰段脊髓内见长条状高代谢病灶，考虑为肿瘤向脑干及大部分脊髓播散、种植转移

D.正常情况下脊髓内无明显放射性浓聚，当出现椎管内肿瘤转移则可表现为¹⁸F-FDG明显浓聚，呈“辫子征”

E.以上都不是

关于复合树脂，下列说法叙述错误的为（）。

A.复合树脂的线胀系数大于天然牙

B.体积收缩导致复合树脂与牙体之间形成边缘裂缝是复合树脂的一大缺陷

C.在树脂基质相同的情况下，填料越多，复合树脂的线胀系数越小

D.填料含量多、粒度大的比填料含量少、粒度小的复合树脂的机械强度高

E.小颗粒型复合树脂有光洁的表面和良好的色泽稳定性，广泛用于前牙

1931年九一八事变开始，日本帝国主义是怎样一步步侵略中国的？

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在分配稀有卫生资源时，不应该坚持的是

A．个人的实际需要

B．个人之间的平均分配

C．个人的支付能力

D．个人的实际工作能力

E．个人对社会的贡献