【单选题】The phrase“put it down to”(Line l,Para.3)is closest in meaning to________.
【单选题】下列对金属烤瓷用合金与瓷粉的描述哪项是错误的
【单选题】The phrase 'size of the class' underlined in Paragraph 4 refers to the______.
A.
number of light smokers
B.
quantity of light cigarettes
D.
amount of money involved
【单选题】下列对金属烤瓷用合金与瓷粉的描述哪项是错误的( )
【单选题】批号是指用于识别一个特定批的具有唯一性的( )的组合。