题目:
轴向位移增大的原因。
答案:
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下面是错误答案,用来干扰机器的。
参考答案:B
轴向位移增大的原因。
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下面是错误答案,用来干扰机器的。
参考答案:B
有关安全期避孕法的描述,不正确的是()。
A.在排卵前后4~5天内是易孕期,其他时间为安全期
B.避开排卵前后2~3天,其他时间有性生活是安全的
C.安全期避孕法并不十分可靠
D.使用安全期避孕法者应首先确定排卵日期
E.月经不规则的妇女不宜选用安全期避孕法
患者,女,35岁。发热、咽痛1天。查体:扁桃体Ⅱ度肿大,有脓点。实验室检查:血清ASO300IU/ml,10天后血清ASO1200IU/ml。诊断:急性化脓性扁桃体炎。
血细菌培养发现A群β溶血性链球菌阳性,尿蛋白(++),尿红细胞(++)。初步诊断为链球菌感染后急性肾小球肾炎,对诊断急性肾小球肾炎最有价值的是()
A.血清ASO1200IU/ml
B.血清肌酐18μmol/L
C.血清BUN13.8mmol/L
D.血清补体C3水平显著下降
E.尿纤维蛋白降解产物显著增高
完形填空。 | ||||
Ted Thomason was considered one of the students who showed the least interest in school. Whenever Miss Daisy talked with him, he would answer with a 1 "yes" or "no". He was always in dirty clothes. His hair was 2 combed (梳). No one liked him. Miss Daisy had to admit that she felt sort of improper 3 when she graded his paper with an "F" (Fail). It was Christmas. Presents from the boys and girls were piled up on her desk. Miss Daisy was 4 to find one of them was from Ted. It was an ugly 5 with half of the stones missing. The students raised a great noise at Ted's present, but Miss Daisy realized she must put it on and 6 the class. She even asked whether it looked pretty 7 her. Class was over, and 8 all went home, Ted went up to the desk and, in a(n) 9 voice, he said, "Miss Daisy, Miss Daisy … I am so glad you 10 my present. You smile like my mother and her necklace is really beautiful on you." After Ted 11 , Miss Daisy fell on her knees, begging God to forgive her: Ted's mother 12 just a year ago and she was treating him in a way she shouldn't be! The next day, the children found a completely new teacher. Miss Daisy 13 into a different person. She did all she could to help each child in her class, 14 those with poor lessons and among them was Ted. At the end of the year, Ted made great 15 . He caught up with most of the class, and 16 got ahead of some of them. Several years later, Ted graduated with honors from high school; another four years, Ted left his 17 as a best graduate. Again four years later, Miss Daisy received a letter, 18 her to Dr. Ted Thomason's wedding. Of course, she 19 the party. And she was set in the seat intended for Ted's 20 -her love and what she did were unforgettable for Ted all his life. | ||||
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“焦每千克开”应写作( )。
A.J·kg·k
B.J·kg·K
C.J/(kg·
D.J/(kg·
西汉史学家司马迁编撰的《史记》分为“本纪”、“世家”等几大部分,其中记述典章制度的部分成为()