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【单选题】
关于纵模频率、纵模序数、纵模频率间隔的说法,不正确的是:A.
相邻纵模的频率间隔可由真空光速c除以往返光程来计算。
B.
实际激光器振荡激光，其纵模序数一般很大。
C.
增大谐振腔的腔长，纵模频率间隔会变小。
D.
略微增加腔长，某个纵模的特征频率也会增加。
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举一反三
【单选题】Marginal revenue is equal to
A.
total revenue divided by price.
B.
the change in total revenue divided by total output.
C.
the change in total revenue divided by the change in quantity sold.
D.
price divided by quantity sold.
【单选题】The earning of revenue on account is recorded by a ( )
A.
debit to cash and a credit to revenue
B.
debit to accounts receivable and a credit to revenue
C.
debit to accounts payable and a credit to revenue
D.
debit to revenue and a credit to accounts receivable
【单选题】Total surplus with a tax is equal to
A.
consumer surplus and producer surplus.
B.
consumer surplus minus producer surplus.
C.
consumer surplus, producer surplus, and total surplus.
D.
consumer surplus, producer surplus, and tax revenue.
【简答题】稳定蛋白质胶体的因素是____和水化膜。
【简答题】婴儿通过哺乳可获得的Ig 是 ;
【简答题】只有当保存按钮被点击时才传递meal,若要确定何时发生此情况,需要将保存按钮添加为____:
【单选题】Total surplus in a market is
A.
the total cost to sellers of providing the good minus the total value of the good to buyers.
B.
the total value of the good to buyers minus the cost to sellers of providing the good.
C.
the difference between consumer surplus and sellers’ cost.
D.
always smaller than producer surplus.
【单选题】Total surplus is defined as
A.
consumer surplus + producer surplus.
B.
consumer surplus - producer surplus.
C.
another word for profit.
D.
another word for total revenue.
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