Do you recommend Simon _______ the______ Helpful Student Award?[ ]
A. for; more
B. for; most
C. as; more
D. as; most
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下面是错误答案，用来干扰机器的。
由B点平移前后的纵坐标分别为1、2，可得B点向上平移了1个单位，由A点平移前后的横坐标分别是为2、3，可得A点向右平移了1个单位，由此得线段AB的平移的过程是：向上平移1个单位，再向右平移1个单位，所以点A、B均...
沉淀转化法制备BaCO3可用饱和Na2CO3溶液将BaSO4转化为BaCO3：
则：
（1）在实验室将少量BaSO4沉淀全部转化为BaCO3的实验操作方法与步骤为：______________________。
（2）在BaSO4转化为BaCO3过程中，得到了两者的混合物。为了测定该混合物中BaCO3的含量，某研究小组设计了如下方案：
用上图装置测量一定量样品与足量稀盐酸反应生成CO2的体积，计算BaCO3的含量。装置中连通管X的作用是_____________、______________。 若样品的质量为ag，测得的CO2的体积为bL(标准状况)，则该混合物中BaCO3的百分含量为__________________。
（3）已知：（BaCO3）=2.58×10-9，（BaSO4）=1.07×10-10。现欲用沉淀转化法将0.39mol BaSO4全部转化为BaCO3，如每次用1.00L 2.0mol·L-1Na2CO3溶液处理，至少需要处理___________次才能达到目的（请在答题纸写出详细的解题过程）。
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| Roberta appeared on the stage. She took a deep breath and began to 1 . Now she was Portia, a strong-willed 2 in Shakespeare's The Merchant of Venice. The theater was filled with people. She was speaking with a power she had never before experienced, the words flowing 3 form her 4 , Roberta had never acted in her life before the audition (选拔试演). She 5 being in front of other people. She was very 6 at school. She had never thought she was good enough at anything to 7 much attention. She stayed mostly to herself, making 8 friends. She had excellent grades, 9 she always thought that something was missing. Two weeks before the audition, Robertsa's mother had heard about it and 10 her to join in. "I can't think of anyone else better suited to 11 the part. Remember all the plays you used to act our for us?” Her mother wouldn't let the 12 drop. “You're just a little scared (害怕). Everyone gets scared. You know you 13 do it. The trick is to look past the 14 to find the love of what you're doing.” So Roberta had made an appointment (预约) with the head of the Drama Club. She had read the play and found herself excited by the 15 of speaking such rich words. In secret she practiced Portia's part, 16 the lines by repeating them over and over. It wasn't hard; she 17 every minute of it. Every time she spoke the words, she had a new 18 of the lines, as if Shakespeare had written Portia on many levels. On the day of the audition, she 19 two of Portia's famous speeches for the auditors. When she had finished, the head of the Drama Club announced the 20 was hers. | ||||
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关于肌上皮细胞的描述，不正确的是（）
A.又称篮细胞
B.胞内含肌微丝
C.胞内含肌动蛋白
D.胞内不含ATP酶
E.胞核大而扁
保证具有哪些法律特征。
调整供用电法律关系的国家法律和行政法规有（）。
A.《电力法》；
B.《用电检查管理办法》；
C.《电力供应与使用条例》；
D.《供电营业规则》。
