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【简答题】
MCS—51单片机的P0—P3口均是并行 I/O口, 其中的P0口和P2口除了可以进行数据的输入、输出外,通常还用来构建系统的( ) 和( ) ,在 P0—P3口中,( ) 为真正的双向口,( ) 为准双向口 。
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举一反三
【单选题】When you are writing a business fax, you should not to:
A.
Write the telephone number of your fax.
B.
Write the telephone number of the recipient.
C.
Omit the sender ’ s name.
D.
Write the number of pages of your fax.
【单选题】When you are writing a business fax, you should not:
A.
Omit the sender's name.
B.
Write the telephone number of your fax.
C.
Write the telephone number of the recipient.
D.
Write the number of pages of your fax.
【单选题】When you writing a business fax, you should not to:
A.
write the telephone number of your fax.
B.
write the number of pages of your fax.
C.
write the telephone number of the recipient phone.
D.
omit the sender's name.
【单选题】When you are writing a business fax, you should NOT to:
A.
Write the telephone number of your fax.
B.
Write the number of pages of your fax.
C.
Write the telephone number of the recipient phone.
D.
Omit the sender’s name.
【简答题】公司的行业地位分析的侧重点是（ ）。
【简答题】In writing fax messages，plain language is often used，simplified words or abbreviations are often used．（ ）
【简答题】公司的行业地位分析的侧重点是（ ）。
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