计算直径为22mm、频率为1.25MHz的直探头在钢中的近场长度（钢C1＝5900m/s）是（）

[单选题]帕金森病的专用量表，错误的是（）。

[单选题]临床资料：男，75岁，自述进行性视物模糊。超声综合描述：眼球形态正常，晶状体前后皮质回声增强，内透声不清亮，呈椭圆形强回声（箭头所指）。 超声提示（）。

[单选题]为实现国民经济长期稳定增长这一任务，首要的是（）。

[单选题]请阅读Passage 2,完成第 26~30小题。Passage 2For centuries in Spain and Latin America, heading home for lunch and a snooze with the family was some thing like a national right, but with global capitalism standardizing work hours, this idyllic habit is fast becoming an endangered pleasure. Ironically, all this is happening just as researchers are beginning to note the health benefits of the afternoon nap.According to a nationwide survey, less than 25 percent of Spaniards still enjoy siestas. And like Spain, much of Latin America has adopted Americanized work schedules, too, with shortened lunch times and more rigid work hours. Last year the Mexican government passed a law limiting lunch breaks to one hour and requiring its employees to work their eight-hour shift between 7 a.m. and 6 p.m. Before the mandate, workers would break up the shift-going home midday for a long break with the family and returning to work until about 9 or 10 p.m. The idea of siesta is changing in Greece, Italy and Portugal, too, as they rush to join their more "industrious" counterparts in the global market.Most Americans I know covet sleep, but the idea of taking a nap mid-afternoon equates with laziness, un employment and general sneakiness. Yet according to a National Sleep Survey poll, 65 percent of adults do not get enough sleep. Numerous scientific studies document the benefits of nap taking, including one1997 study on the deleterious effects of sleep deprivation in the journal Internal Medicine. The researchers found that fatigue harms not only marital and social relations but worker productivity.According to Mark Rosekind, a former NASA scientist and founder of Solutions in Cupertino, Calif., which educates businesses about the advantages of sanctioning naps, we're biologically programmed to get sleepy between 3 and 5 p.m. and 3 and 5 a.m. Our internal timekeeper-called the circadian clock-operates on a 24-hour rotation and every 12 hours there's a dip. In accordance with these natural sleep rhythms, Rosekind recommends that naps be either for 40 minutes or for two hours. Latin American countries, asserts Rosekind, have had it right all along. They've been in sync with their clocks; we haven't.Since most of the world is sleep-deprived, getting well under the recommended eight hours a night (adults get an average of 6.5 hours nightly), we usually operate on a kind ofidle midday. Naps are even more useful now that most of us forfeit sleep because of insane work schedules, longer commute times and stress, In a study published last April, Brazilian medical researchers noted that blood pressure and arterial blood pressure dropped during a siesta.The author suggests that most Americans feel that ____.

[单选题]其他权益性投资方，这些投资企业对该“僵尸企业”的长期股权投资，应当按照可收回金额与账面价值孰低进行计量，前者低于后者的，其差额计入（）。

[判断题]节能技术服务中心一般是事业单位，为企业提供无偿服务。

[单选题]男，48岁，持续发热30天，体温37.6～39.2℃，伴右季肋部疼痛，纳差、盗汗，体重下降约8kg，曾在当地注射青霉素10天，服诺氟沙星10天，无明显好转，近日疼痛加剧，坐卧不安。 上述病例住院当天晚上突感心前区剧痛，呼吸困难，面色苍白，烦躁不安，发绀，心率134次/分。该病人病情加重的原因最可能是（）

[单选题]以下（）的部门委员必须参加贷审会。

[单选题]以下内容正确的是（）

[多选题]影响骨折愈合的局部因素，下列正确的是（　）

[单选题]计算直径为22mm、频率为1.25MHz的直探头在钢中的半扩散角(钢C1＝5900m/s)是（）

[单选题]计算直径为22mm、频率为1.25MHz的直探头在钢中的近场长度（钢C1＝5900m/s）是（）

[单选题]计算直径为22mm、频率为1.25MHz的直探头在钢中的半扩散角(钢C1＝5900m/s)是（）

[单选题]计算直径为22mm、频率为1.25MHz的直探头在钢中的近场长度（钢C1＝5900m/s）是（）

[问答题]计算题：计算直径为22mm，频率为1.25MHz的直探头在钢中的近场长度和半扩散角。（钢C1=5900m/s）

[问答题]计算题：计算直径为22mm，频率为1.25MHz的直探头在钢中的近场长度和半扩散角。（钢C1=5900m/s）

[问答题]计算直径为22mm，频率为1．25Mhz的直探头在钢中的近场长度和半扩散角？（钢Cl＝5900M/S）

[问答题]计算直径为22mm，频率为1．25Mhz的直探头在钢中的近场长度和半扩散角？（钢Cl＝5900M/S）

[单选题]若在均质的材料表面下15mm处的纵波声速为5900m/s，则在表面下50mm处声速为：（）

[单选题]一台仪器的工作频率是2.5MHz，在探测钢工件时，纵波波长为（）。（钢C1=5900m/s，钢Cs=3200m/s）