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【简答题】
用所给单词的正确形式填空。 1. ―Do you like _____ (tomato) ? ―Yes, very much. 2. -Can he _____ (turn) off the light? -Yes, he can. 3. It's half past seven now. Sandy _____ (write) a letter to her friend. 4. -How long do you spend _____ (do) your homework every day? -Two hours. 5. Millie, _____ (not put) it on now. Wait a minute. 6. Jim! Whose turn is it _____ (make) a wish? 7. Look at the shoes. They're those _____ (dance). 8. They ask us _____ (raise) money for poor children in our country. 9. The boy often makes the girl _____ (cry). You should teach him a lesson. 10. Daniel doesn't have a healthy diet. He often goes to school without _____ (eat) breakfast. 11. -What _____ the scarves _____(make) of? -Wool. 12. He often _____ (carry)water for me. He's a kind person.
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【单选题】用 HCl 标准溶液滴定碳酸盐混合碱液, V 1 为滴定到酚酞变化时耗 HCl 的体积, V 2 为从酚酞终点滴到甲基橙终点时耗 HCl 的体积。若混合液中所含 NaHCO 3 和 Na 2 CO 3 的浓度相等,则( )。
A.
V 1 = 2V 2
B.
V 1 = V 2
C.
2V 1 = V 2
D.
V 1 = 0
【单选题】成人生长素过多将导致
A.
腺瘤
B.
黏液性水肿
C.
巨人症
D.
肢端肥大症
E.
甲状腺肿
【单选题】成人生长素过多将导致
A.
肢端肥大症
B.
黏液性水肿
C.
巨人症
D.
腺瘤
【单选题】(第二套News report 2) 4.
A.
A flood wall was built.
B.
Rescue teams were formed.
C.
An alarm system was set up.
D.
50 underground stations were made waterproof.
【单选题】News Report 2 4.
A.
They will not be welcomed by young people.
B.
They will not come into immediate effect.
C.
They will boost China's economic growth.
D.
They will help to popularize early marriage.
【单选题】用HCl标准液滴定碳酸盐混合碱液。V1为滴定到酚酞终点时所用的HCl溶液容积,V2是从酚酞终点滴定到甲基橙终点时所用的HCl溶液容积。若混合液中所含的Na2CO3和NaHCO3的浓度(单位:mol/L)相等,则
A.
V1=2V2
B.
V1=V2
C.
2V1=V2
D.
V1=0
【单选题】(News report 2) 4.
A.
Show off photos they had taken abroad.
B.
Share photos of their children with their friends.
C.
Share their travel experiences on social media.
D.
Show off a costly item they had bought.
【判断题】Linda has already finished the report.
A.
正确
B.
错误
【单选题】用HCl标准溶液滴定碳酸盐混合碱液,V 1 为滴定到酚酞变化时所耗HCl的体积,V 2 为从酚酞终点滴到甲基橙终点时耗HCl的体积。若混合液中所含NaHCO 3 和Na 2 CO 3 的浓度(mo/L)相等,则( )。
A.
V 1 =2V 2
B.
V 1 =V 2
C.
2V 1 =V 2
D.
V 1 =0
【单选题】用 HCl 标准溶液滴定碳酸盐混合碱液。滴定至酚酞终点时耗去 酸 ,从酚酞终点滴定至甲基橙终点时耗去 HCl 溶液 。若混合液中所含的 和 的浓度相等 ,则 ( )
A.
V1=V2
B.
V1=2V2
C.
2V1=V2
D.
V1=0
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