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男性，15岁。有胫骨近端疼痛、肿胀1个月，夜间痛明显，无明显外伤史。

患者最有可能的诊断是（）。

A.骨囊肿

B.骨纤维异样增殖症

C.动脉瘤样骨囊肿

D.内生性软骨瘤

E.骨肉瘤

F.化脓性骨髓炎

G.骨折

H.骨巨细胞瘤

答案

参考答案：C, E, F, H

单项选择题

Observe that for the programmer，as for the chef,the urgency of the patron(顾客) may govern the scheduled completion of the task，but it cannot govern the actual completion．An omelette(煎鸡蛋)，promised in two minutes，may appear to be progressing nicely．But when it has not set in two minutes，the customer has two choices—waits or eats it raw．Software customers have had (71) choices．

Now I do not think software (72) have less inherent courage and firmness than chefs，nor than other engineering managers．But false (73) to match the patron’s desired date is much more common in our discipline than elsewhere in engineering．It is very (74) to make a vigorous，plausible，and job risking defense of an estimate that is derived by no quantitative method，supported by little data，and certified chiefly by the hunches of the managers．

Clearly two solutions are needed．We need to develop and publicize productivity figures，bug-incidence figures，estimating rules，and so on．The whole profession can only profit from (75) such data．Until estimating is on a sounder basis，individual managers will need to stiffen their backbones and defend their estimates with the assurance that their poor hunches are better than wish derived estimates．

（72）处填（）。

A．testers

B．constructors

C．managers

D．architects
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填空题

如图是探究电流产生热量与电阻关系的电路，R1=10Ω，R2=5Ω，闭合开关后，电流表示数为1A．加在电阻R1两端的电压是______V，通过电阻R2的电流在10s内产生的热量是______J．
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