类风湿关节炎病情活动相关的辅助检查是（）
A.类风湿因子（RF.
B.抗核抗体（ANA.谱
C.血沉（ESR）和C反应蛋白（C-RP）
D.关节X线检查
E.血清补体
参考答案：C
解析：血沉和C反应蛋白均为类风湿关节炎非特异性指标，但可作为判断类风湿关节炎疾病活动程度和病情缓解的指标。而RF也可出现在SLE、原发性干燥综合征、系统性硬化病等疾病。X线片对诊断、病变分期以及监测病情演变均重要，不利于早期发现RA的病变。急性期和活动期血清补体均有升高，只有在少数有血管炎者出现低补体血症。
读下面短文，从短文后面各题的A、B、C、D四个选项中，选出适合填入对应空白处的最佳选项，并在答题卡上将该项涂黑。 Every summer a great many students travel to other countries looking for work and adventure. Most of the 26 are in seasonal work, mainly connected with wourism and 27 The pay is usually poor, but most people work abroad for the 28 of travel. You can pick grapes on farms in France, entertain kids on American summer camps, and, of course, there are 29 jobs in hotels and restaurants. But it is not easy now to find work. “ 30 you speak the language of the country well, there will be very few openings,” says Althea Ellis, an adviser in 31 for students. “If you work with a family in Italy, you’ll have to speak Italian. When you wash dishes in a restaurant in Pairs, the owner will expect you to speak 32 . British students only have a language 33 for jobs in the USA and Australia.” 34 enjoys the experience. Sarah James was employed to help forty American children in Europe. The two teachers with the children had never been 35 .One child lost his passport; another became seriously ill and was 36 home; the whole group was thrown out of one hotel because of the 37 they made, and what’s worse, Sarah herself was robbed on her only 38 evening of the entire trip. “ I did visit a lot of new places,” she says,“ but it wasn’t worth it. The pay was 39 and it really was a 24-hour-a-day job. The kids never slept!” “The troubles is, students expect to have a(n) 40 time of it.” Althea Ellis points out. “After all, they see it as a 41 .In practice, 42 ,you have to work hard. At the same time, all vacation work is casual (临时的) work. You’ll have a job when the hotel, the restaurant, or the campsite is busy. In the other words, you’ll work if it’s convenient for the company that 43 you. But you have 44 employment rights. As soon as the holiday season 45 ,they’ll get rid of you.”
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