单项选择题 SECTION C NEWS BROADCASTDirections: In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. At the end of each news item, you will be given 10 seconds to answer the questions.听力原文： The cancellation of the 16-day flight means that the crew and scientists on the ground are pursuing only their most important experiments in the few remaining hours left before the shuttle laboratory is closed. The US space agency NASA decided Sunday to bring the orbiter home 12 days early because of fears of weakened power generator could explode. The generator has been turned off, leaving the shuttle with only two thirds of its normal power supply. To conserve electricity for the experiments the crew is working in dimmer lighting than normal and has turned off all unessential equipment. NASA says the two remaining generators are sufficient for Tuesday's landing, but had nevertheless ordered the astronauts to study emergency procedures in case another fails. The shuttle team has expressed its disappointment at the curtailment of the science mission, and says enough data have already been collected in the materials, combustion and biological experiments to push science further ahead. The scientist' goal is to complete the experiments on a later shuttle flight. David Batlery, VOA news, Washington.Why did NASA decide to bring the shuttle home earlier?A．The laboratory was closed.B．The generator was turned off.C．The power generator might explode.D．Electricity was going to run out.

单项选择题 患者，男性，55岁，反复不规律上腹部胀痛3年，胃镜诊断为萎缩性胃炎。判断该患者炎症活动的客观依据是（）

单项选择题 患者男性，64岁。有长期酗酒史，因肝硬化多次住院。此次因消瘦明显，肝区隐痛2周伴腹水和黄疸再次入院。查体：T36．1℃，脉搏92次／分，呼吸26次／分，血压140／80mmHg。根据其病史，他的实验室检查结果可能有（）