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在工程网络计划中，对关键线路描述不正确的是（）。
The approximately 65,000 images the Surveyor orbiter has beamed home in the nearly three years it has been circling Mars are full of this kind of expected hydro-scarring. But some of the pictures took scientists by surprise. The older a formation is, the more likely it is to have been distorted over the eons--smoothed by periodic windstorms or gouged by the occasional incoming meteor. However, a few of the newly discovered water channels look flesh. That discovery has lead astonished researchers to conclude that these channels may have been recently formed. Paleontologists have long assumed that if underground water was going to bubble up on Mars, it would have to be somewhere in the balmy equatorial zones, where temperatures at noon in midsummer may reach 68 degrees Fahrenheit (20 degrees Centigrade). Almost all the new channels, however, were discovered at the planet’s relative extremes--north of 30 degrees north latitude and south of 30 degrees south latitude--and all were carved on the cold, shaded sides of slopes.
慢性支气管炎患者突感左上胸短暂刺痛，逐渐呼吸困难，不能平卧，心率120次／分，查体：左肺呼吸音明显减弱，考虑为（）
速度单位中1马赫近似为（）m/s。
ZPW-2000A型无绝缘移频自动闭塞轨道电路的调谐区长度为39米。（）
下列哪些疾病的治疗首选青霉素（）
GMP对人员培训的要求是什么？
长期人寿保险合同具有（）特征，因此这类合同通常有保单贷款、自动垫交保费等条款，而且保单具有现金价值。
女性内生殖器不包括（）。
个人因从事彩票代销业务而取得所得，应按照"个体工商户的生产、经营所得"项目计征个人所得税。（）
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