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【判断题】
光纤通信就是以光波为载波、光导纤维为传输介质的一种通信方式。A.
正确
B.
错误
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】In a double-entry accounting system
A.
most of all the accounts have a normal credit balance.
B.
liabilities, owners’ equity, and revenue accounts all have normal debit balances.
C.
a debit entry is recorded on the left side of a T-account.
D.
a debit entry is recorded on the right side of a T-account.
【单选题】What is double entry for trade discount allowed to a customer?
A.
DR： sales CR： trade discount
B.
DR： trade discount CR： sales
C.
DR： purchases CR： trade discount
D.
No double entry is required
【单选题】The double-entry accounting system means
A.
Each transaction is recorded with two journal entries.
B.
Each item is recorded in a journal entry, then in a general ledger account.
C.
The dual effect of each transaction is recorded with a debit and a credit.
D.
None of these answer choices are correct.
【单选题】关于生物制品的特点,以下说法不正确的是
A.
分子量不是定值
B.
通常采用生化方法进行结构确定
C.
需要进行效价测定
D.
需要检查生物活性
E.
不要求做安全性检查
【简答题】double entry_________
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