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【简答题】
在液相色谱中，为改善分离度并调整出峰时间，可通过改变流动相______和______的方法达到。
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举一反三
【单选题】— ______ does his sister water the flowers? — Once a day. [ ]
A.
How many
B.
How long
C.
How soon
D.
How often
【简答题】由于有价证券是虚拟资本，所以它的价格总额总是小于实际资本额。（ ）
【单选题】听力原文：M: We are having a party Saturday night. Can you come? W: I wish I could. But I work at the hospital on weekends. Why can't the woman go to the party?
A.
Because she is sick.
B.
Because she has to work.
C.
Because she likes to stay at home.
【单选题】听力原文：W: Hello, I'm Mary, but have we met before? M: No, I'm new here. I just started working for this company. What can we learn about the man from the conversation?
A.
He's the boss.
B.
He's a visitor.
C.
He's a new employee.
D.
He's the woman's friend.
【单选题】Searching for errors of a trial balance A trial balance has total debits of $20,000 and total credits of $24,500. Which one of the following errors would create this imbalance?
A.
A $2,250 credit to Consulting Fees Earned (Revenues) in a journal entry is incorrectly posted to the ledger as a $2,250 debit, leaving the Consulting Fees Earned account with a $6,300 credit balance.
B.
A $4,500 debit to Salaries Expense in a journal entry is incorrectly posted to the ledger as a $4,500 credit, leaving the Salaries Expense account with a $750 debit balance.
C.
A $2,250 debit to Utilities Expense in a journal entry is incorrectly posted to the ledger as a $2,250 credit, leaving the Utilities Expense account with a $3,000 debit balance.
D.
A $2,250 debit posting to Accounts Receivable was posted mistakenly to Land.
E.
A $4,500 debit posting to Equipment was posted mistakenly to Cash.
F.
An entry debiting Cash and crediting Accounts Payable for $4,500 was mistakenly not posted.
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