神化传说类的动物有哪些？

吸痰前后应当给予（）吸氧，吸痰时间不宜超过（）S，如痰液较多，需要再次吸引，应间隔（）分钟，患者耐受后再进行。一根吸痰管只能使用（）次。

如图所示电路，电源电压和定值电阻R_x都未知，R₁是调节范围足够大的电阻箱，R₂和R₃的电阻值分别是3R和6R，闭合开关S后，当电阻箱电阻值调节为R时电流表读数为I₀，当电阻箱电阻值再调节为6R时电流表读数为．求：

（1）计算电阻箱电阻值调节为R时R₃的电功率；

（2）电源电压和定值电阻Rx的阻值；

（3）如果在电路中A、B两点间接入一个电压表，不断改变电阻箱的阻值，将会得到一系列电压表和电流表的读数，请在乙图的坐标系U﹣I中定性地画出电压表和电流表的读数所反映的图线．

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II 语言知识及应用(共两节，满分35分)

第一节完型填空（共10小题；每小题2分，满分20分）

阅读下面短文，掌握其大意，然后从21~30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 

Okay, you are in the classroom, you’ve got the proper attitude, your instructor seems eager and energetic and you’re ready to learn. Your instructor starts    21    . You listen to the first few words and then begin to take notes. Copious notes. At the end of 45 minutes you have literally rewritten the    22   . Your hand is sweaty from the constant writing and you’ve filled up seven pages of your notebook. But one thing is    23   . You forgot to listen to the lecture.

This is a    24    problem in all classes. You are so afraid that you might miss something “important” that your tendency is to write    25    down. We all do because we have all committed this    26    at one time or another. I realize it’s easy for me to say this, but it is much better to listen to the lecture carefully and    27   only those things that were genuinely important.

It goes without saying that your notes should be written readably. I wouldn’t suggest rewriting your   28    after every class but sometimes this will help you understand and recollect the material better. Organize your notes into brief    29   . Use arrows, stars, asterisks and other notational devices to highlight things that seem really important. As a rule, if there is anything you don’t understand, bring it up during the next class period. If not, you will be doing yourself, and everyone    30     in the class, a great injustice.

21. A. speaking                    B. saying                      C. talking                            D. discussing

22. A. speech                       B. lecture                            C. lesson                      D. class

23. A. missing                      B. going                       C. losing                      D. leaving

24. A. average                      B. ordinary                   C. common                   D. usual

25. A. anything                    B. something                C. nothing                    D. everything

26. A. behavior                    B. action                      C. fault                        D. error

27. A. record                       B. notice                      C. memorize                 D. keep

28. A. comments                  B. notes                        C. diaries                      D. works

29. A. styles                         B. sections                    C. species                     D. designs

30. A. rest                           B. remaining                 C. other                        D. else

全面质量管理对保证安全输血中不准确的描述是（）。

A.建立输血质量管理体系是为献血者提供安全满意的服务

B.建立输血质量管理体系是为受血者提供安全、有效的血液的必要前提

C.建立输血质量管理体系是可以有效控制成本，保证经济效益的手段

D.建立输血质量管理体系是保证输血安全的必然途径

急性白血病化疗后已达到持续完全缓解的指标是（）

A.临床上无浸润的症状和体征

B.血象恢复，无白血病细胞

C.原始细胞＜5%

D.骨髓粒、红、巨核三系比例正常

E.从治疗后完全缓解之日起计算，其间无白血病复发达3年以上者