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【单选题】
下列产品的使用不会对环境造成污染的是( )A.
含磷洗衣粉
B.
酒精
C.
氟里昂
D.
含汞电池
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举一反三
【单选题】Which of the following underlined letters is different in pronunciation with others?
A.
He arrived there half an hour late
B.
Tom is the most honest boy in his class
C.
I really hope to
D.
It is a great honor for me to be here
【简答题】Which letter comes next in this series of letters? BACBDCEDF?
【简答题】全文数据库属于 , 即收录有 全文的数据库 。
【单选题】Businesses choose letters to conduct transactions for which of these reasons? ( )
A.
Letters convey a sense of urgency and indicate the need to complete transactions promptly.
B.
Letters represent the business's awareness of current trends and show customers its ability to communicate via up-to-date channels.
C.
Letters are the No. 1 channel of communication in business today, and businesses use letters to conduct most external transactions.
D.
Letters provide confidentiality, formality, and sensitivity to transactions that may also require a permanent recorD.
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