用单缸断火法检查发动机异响，声响明显减弱或消失，则说明（）。A.该缸活塞敲缸异响 B 发布时间：2017-05-11 16:07 │ 来源：www.tikuol.com 题型：单项选择题 问题： 用单缸断火法检查发动机异响，声响明显减弱或消失，则说明（）。A.该缸活塞敲缸异响B.该缸连杆轴承异响C.该缸活塞环折断D.气门脚异响
题型：单项选择题 完形填空。 When I first entered university, my aunt, who is an English professor, gave me a new English dictionary. I was 1 to see that it was an English dictionary, also known as a monolingual dictionary. Although it was a dictionary intended for 2 learners, none of my classmates had one and, to be honest, I found it extremely 3 to use at first. I would look up words in the dictionary and still not fully understand the meaning. I was used to the 4 bilingual dictionaries, in which the words are 5 both in English and Chinese. I really wondered why my aunt 6 to make things so difficult for me. Now, after studying English at university for three years, I 7 that monolingual dictionaries are 8 in learning a foreign language. As I found out, there is , in fact, often no perfect equivalence (对应) between two 9 in two language. My aunt even goes so far as to 10 that a Chinese "equivalent" can never give you the 11 meaning of a word in English! Therefore, she insisted that I read the definition (定义) of a word in a monolingual dictionary when I wanted to get a better understanding of its meaning. 12 , I have come to see what she meant. Using a monolingual dictionary for learners has helped me in another important way. This dictionary uses a (n) 13 number of words, around 2,000, in its definitions. When I read these definitions, I am 14 exposed to the basic words and learn how they are used to explain 15 and ideas. Because of this, I can express myself more easily in English.( )11. A. worried ( )12. A. native ( )13. A. difficult ( )14. A. new ( )15. A. explained ( )16. A. offered ( )17. A. imagine ( )18. A. natural ( )19. A. words ( )10. A. hope ( )11. A. exact ( )12. A. Largely ( )13. A. extra ( )14. A. repeatedly ( )15. A. feelings B. sad B. non-native B. interesting B. familiar B. expressed B. agreed B. recommend B. better B. names B. declare B. basic B. Generally B. average B. nearly B. phenomena C. surprised C. elementary C. handy C. earlier C. described C. decided C. predict C. easier C. ideas C. doubt C. translated C. Gradually C. total C. immediately C. issues D. nervous D. advanced D. practical D. ordinary D. created D. happened D. understand D. convenient D. characters D. tell D. expected D. Probably D. limited D. anxiously D. objects 查看答案
题型：单项选择题 利润最大化原则P=MC意味着，要取得最大利润，厂商应该（）。A.逐渐增加产量，直到价格下降到与边际成本相等为止B.逐渐增加产量，直到边际成本下降到与价格相等为止C.逐渐增加产量，直到边际成本上升到与价格相等为止D.逐渐增加产量，直到边际成本趋近于零 查看答案