某温度下,在50mLCCl4溶液中含有0.568gI2,若在500mL水含碘0.00

题型:单项选择题

问题:

某温度下,在50mLCCl4溶液中含有0.568gI2,若在500mL水含碘0.00133mol/L,则CCl4溶液中含碘的浓度是()。

A.0.0315mol/L

B.0.115mol/L

C.1.15mol/L

D.0.315mol/L

考点:有机化学工程基本有机化工工艺考试基本有机化工工艺考试题库
题型:单项选择题
完形填空。
     Two years ago, I went to Michigan in the United States  1  an exchange student. I wanted to
improve my English and learn about the culture there.
      2 , I learned something else: When you are in trouble, you should believe love is here and there.    
On the 26th of August, my host family  3  me up from the airport in a big American car. In the car, I
did not talk much  4  my English was poor. And when we got home, I tried to answer their questions
fast and got to bed early.    
     The first week at my new home was OK. The following weeks, I  5  that the family was really
strict and cold.    
     One day, the son of the family  6   a baby parrot as a gift. Later on, the bird was really sick. But the
child told his mom it was because every night, when  7  was sleeping, I poured some dirty water straight
at the bird. My host mom  8   the lie of her son and my sad life there started. Then one day the parrot
was  9 . I had to leave the home. The family all thought I killed it.
      10 , I made more friends in school and I could move to live with them. They gave me love when I
was in trouble. Now, I visit them once or twice a year.
( )1. A. as      
( )2. A. So      
( )3. A. looked  
( )4. A. when    
( )5. A. wondered
( )6. A. received
( )7. A. somebody
( )8. A. told    
( )9. A. dead    
( )10. A. Sadly  
B. for        
B. Therefore  
B. turned      
B. because    
B. described  
B. refused    
B. everybody  
B. doubted    
B. ill        
B. Surprising  
C. with    
C. However  
C. put      
C. unless  
C. wished  
C. gave    
C. anybody  
C. believed
C. missing  
C. Unluckily
D. past    
D. Though  
D. picked  
D. if                            
D. found    
D. offered  
D. nobody  
D. broke    
D. well    
D. Luckily  
题型:单项选择题

如图所示是某太阳能电动汽车的电路简化图,由太阳能电池给电动机提供动力,通过一个调速电阻改变电动机转速。已知,太阳能电池电压600V保持不变,调速电阻的最大阻值10Ω,闭合开关, 求:

(1) 当滑片P 在最左端时,电动机的功率是18kW,此时电流表的示数为多大?

(2) 当滑片P 在最右端时,电压表示数为 500V,通过调速电阻的电流为多大?

(3) 当滑片P 在最右端时,电动机的能量利用率是多少?

(电动机能量利用率:电动机消耗的功率与电源输出总功率的百分比)

题型:单项选择题

患者张某,男,35岁。自诉腹痛绵绵,时作时止,喜热恶冷,痛时喜按,饥饿劳累后更甚,得食或休息后稍减,大便溏薄,兼有神疲、气短、怯寒等证,舌淡苔白,脉象沉细。治疗应选下列何方()

A.良附丸合正气天香散加减

B.大承气汤加减

C.少腹逐瘀汤加减

D.小建中汤加减

E.柴胡疏肝散加减

题型:单项选择题

抽样调查法,是指从研究对象的全部单位中抽取一部分进行考察和分析,并用这部分的数量特征去推断总体的数量特征的一种调查方法,有随机抽样和非随机抽样两种。下列属于非随机抽样形式的是()。

A.等距抽样

B.整群抽样

C.判断抽样

D.分层抽样

题型:单项选择题

罗马法规定:采用“要式买卖(买卖的一种方式)”时,当事人必须亲自到场,并由已达婚龄的市民五人出场作证,另由一已达婚龄的市民为司秤人。买卖时,由司秤人持秤,买受人一手持标的物或其象征物,一手持铜块说,“依照罗马法律,此物应归我所有,我是以此铜块和秤买来的”。说毕,以铜块击秤,随即交给出卖人,买卖就告成立,买受人立即取得所有权。对这段材料解读错误的是()

A.买卖行为重视法律形式和程序

B.以铜作为商品交换的一般等价物

C.是商品经济发展的重要表现

D.罗马法形成完整、严密的体系

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