提醒:请将简答题通过学习通图片拍照上传,不是附件啊。每题传相应内容。谢谢。某研...

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提醒:请将简答题通过学习通图片拍照上传,不是附件啊。每题传相应内容。谢谢。某研究性学习小组设计了一组实验来验证元素周期律。 I.甲同学用过氧化氢的水溶液和二氧化锰制备氧气,并将其通入氢硫酸中。 (1)过氧化氢的电子式为________________。 (2)从图1中选择氧气的制备装置:________(填“A”或“B”),反应前需要进行的操作是___________。 (3)该实验如何证明O的非金属性强于S?________________________(用化学方程式表示)。 II.利用图3所示实验装置设计实验来验证氮、碳、硅元素的非金属性强弱。已知A是一种强酸溶液,常温下可与铜反应;B是难溶性块状固体;打开分液漏斗的活塞后,可观察到烧杯中有白色沉淀生成。 (4)写出所选物质或溶液中溶质的化学式:A________,B________,C________。

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参考答案：

举一反三

【单选题】在拨号入网时,当线路接通后MODEM会发出声音,称为( )。

电铃声

开机声

握手声

电波声

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【单选题】Which of the following best represents the journal entry to record the return of goods sold to customers on account?

a debit to Sales Returns and Allowances and a credit to Accounts Receivable

a debit to Merchandise Inventory and a credit to Accounts Receivable

a debit to Sales Returns and Allowances and a credit to Accounts Payable

a debit to Merchandise Inventory and a credit to Accounts Payable

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【简答题】RL 串联交流电路,若R=6Ω,X L =8Ω,接于220V的交流电源上,此时电路的电流I= A.

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【单选题】The journal entry to record inventory costs and direct-material variances for the month of February is

Cutting Department Direct Material Control 342,000 Direct Material Variances 4,500 Work in Process—Cutting Department 337,500

Work in Process—Cutting Department 337,500 Direct Material Variances 4,500 Cutting Department Direct Material Control 342,000

Work in Process—Cutting Department 342,000 Direct Material Variances 4,500 Cutting Department Direct Material Control 337,500

Work in Process—Cutting Department 341,250 Direct Material Variances 750 Cutting Department Direct Material Control 342,000

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【判断题】The journal entry to record the replenishment of a petty cash fund includes a credit to the petty cash fund.

正确

错误

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【单选题】The journal entry to record the replenishment of a petty cash fund includes a credit to the petty cash fund.

TRUE

FALSE

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【单选题】在拨号入网时,当线路接通后MODEM会发出声音,称为( )。

电铃声

开机声

握手声

电波声

查看完整题目与答案

【简答题】RL 串联交流电路,若R=6Ω,X L =8Ω,接于220V的交流电源上,此时电路的功率因数为。(用小数表示)

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【简答题】Write out the journal entry to correct the error: Water expenses of $540 was incorrectly debited to the electricity account

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【单选题】The journal entry to record salaries earned by 10 employees will:

debit Salary Expense and credit Salary Payable for the net pay.

debit Salary Expense and credit Salary Payable for the gross pay.

debit Salary Expense for the gross pay, credit FICA Tax Payable, credit Employee Income Tax Payable and credit Salary Payable for the net pay.

debit Salary Expense for the net pay, debit FICA Tax Payable, debit Employee Income Tax Payable, and credit Salary Payable for the gross pay.

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相关题目：

【单选题】在拨号入网时,当线路接通后MODEM会发出声音,称为( )。

查看完整题目与答案

【单选题】Which of the following best represents the journal entry to record the return of goods sold to customers on account?

a debit to Sales Returns and Allowances and a credit to Accounts Receivable

a debit to Merchandise Inventory and a credit to Accounts Receivable

a debit to Sales Returns and Allowances and a credit to Accounts Payable

a debit to Merchandise Inventory and a credit to Accounts Payable

查看完整题目与答案

【简答题】RL 串联交流电路,若R=6Ω,X L =8Ω,接于220V的交流电源上,此时电路的电流I= A.

查看完整题目与答案

【单选题】The journal entry to record inventory costs and direct-material variances for the month of February is

Cutting Department Direct Material Control 342,000 Direct Material Variances 4,500 Work in Process—Cutting Department 337,500

Work in Process—Cutting Department 337,500 Direct Material Variances 4,500 Cutting Department Direct Material Control 342,000

Work in Process—Cutting Department 342,000 Direct Material Variances 4,500 Cutting Department Direct Material Control 337,500

Work in Process—Cutting Department 341,250 Direct Material Variances 750 Cutting Department Direct Material Control 342,000

查看完整题目与答案

【判断题】The journal entry to record the replenishment of a petty cash fund includes a credit to the petty cash fund.

正确

错误

查看完整题目与答案

【单选题】The journal entry to record the replenishment of a petty cash fund includes a credit to the petty cash fund.

TRUE

FALSE

查看完整题目与答案

【单选题】在拨号入网时,当线路接通后MODEM会发出声音,称为( )。

查看完整题目与答案

【简答题】RL 串联交流电路,若R=6Ω,X L =8Ω,接于220V的交流电源上,此时电路的功率因数为。(用小数表示)

查看完整题目与答案

【简答题】Write out the journal entry to correct the error: Water expenses of $540 was incorrectly debited to the electricity account

查看完整题目与答案

【单选题】The journal entry to record salaries earned by 10 employees will:

debit Salary Expense and credit Salary Payable for the net pay.

debit Salary Expense and credit Salary Payable for the gross pay.

debit Salary Expense for the gross pay, credit FICA Tax Payable, credit Employee Income Tax Payable and credit Salary Payable for the net pay.

debit Salary Expense for the net pay, debit FICA Tax Payable, debit Employee Income Tax Payable, and credit Salary Payable for the gross pay.

查看完整题目与答案

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