The quality range clause is generally applicable to some（）.
A. trade in manufactured goods
B. primary product trading
C. trading of mechanical and electrical products
D. instrument products trading
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According to the Convention, if the seller delivered more than the specified quantity,（）。
A. the buyer has the right to reject the excess part
B. the buyer has the right to reject the whole quantity
C. the buyer may accept or reject the excess, but not the whole lot
D. the buyer has no right to reject the excess part
In order to avoid the breach of contract caused by slightly different delivery contract and quality, some flexible provisions can be made in the contract terms, which can be used at this time（).
A. sale by samples
B. quality latitude
C. sales by confirmation sample
D. quality tolerance
In international trade, the commonly used measurement system is（）。
A. metric systems
British system
C. U.system
D. international system of units
The quantity clause mainly involves ().
A. number of transactions
B. unit of measurement
C. metering method
D. quantity maneuver range
E. quality tolerance
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