RS-232C是 (1) 之间的接口标准，它是 (2) 协议，其机械特性规定RS-232C的D型连接器有 (3) 个插脚。
1（） Gentlemen,
From your advertisement in yesterday’s Evening Paper, I find that you want an English translator in your office. I beg leave to take the liberty of offering myself for the position.
Born in Wuhan in 1980, I am a graduate of Hubei University, and therefore have a good knowledge both in English and Chinese.
Should my application be regarded favourably, I shall endeavour to justify the confidence you may repose in me.
Even ancient Egypt’s mighty pyramid builders were powerless in the face of the famine that helped bring down their civilization around 2180 BC. Now evidence gleaned from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blame-and the same or worse could happen today.
The ancient Egyptians depended on the Nile’s annual floods to irrigate their crops. But any change in climate that pushed the African monsoons southwards out of Ethiopia would have been diminished these floods.
Dwindling rains in the Ethiopian highlands would have meant fewer plants to stablise the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment from the White Nile.
The Blue Nile mud has a different isotope signature from that of the White Nile. So by analyzing i
A. Because they once worked miracles.
B. Because they were well-built.
C. Because they were actually very weak.
D. Because even they were unable to rescue their civilization.
W: That famous mystery story writer Jones Smith’s new book is coming out in May.
M: We probably won’t be able to find a library copy until August.
Computers are now being pushed into schools. We’re told that multimedia will make (1) easy and fun. Students will happily learn from (2) characters while taught by expertly (3) software. Who needs teachers when you’ve got (4) education Bah. These expensive toys are difficult to use in the classrooms and (5) extensive teacher training. Sure, kids love video games (6) think of your own experience: can you (7) even one educational filmstrip of decades past I’ll (8) you remember the two or three great teachers who made a (9) in your life.
Then there’s cyber business. We’re promised (10) catalog shopping just point and click for great deals. We’ll order airline tickets (11) the network, make restaurant reservations and negotiate sales (12) . Stores will become obsolete. So how come my local mall does more (13) in an afternoon t
A. near
B. up
C. close
D. back
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