串行通信中，若收发双方的动作由同一个时序信号控制，则称为( )_爱下问搜题

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问题单项选择题

串行通信中，若收发双方的动作由同一个时序信号控制，则称为( )串行通信。

A．全双共

B．半双共

C．同步

D．异步

答案

参考答案：C

单项选择题 A1型题

紫外线杀菌的最佳波长是（）

A.254nm

B.245nm

C.250nm

D.452nm

E.425nm

阅读理解

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1. Interested in a trip during which she can study plants along the seaside, which number will Kate dial?
A. 082 3711372.
B. 083 8536144.
C. 084 4670752.
D. 082 3711372.

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A. wendy@atlanticadventures. co. za
B. shark@aaax. co. za
C. HorsebackBeachAdventures@gmail. com
D. Cathy@atlanticadventures. co. za

3. Which trip will provide you the opportunity to feel horrible animals face to face?
A. ABSOLUTE MOTHER OF ALL ADVENTURE ACTIVITIES
B. SHARK CAGE DIVING SPECIAL IN GANSBAAI
C. HORSEBACK BEACH ADVENTURES
D. TANDEM SKYDIVING

4. Which of the following statements is NOT true according to the passage?
A. ABSOLUTE MOTHER OF ALL ADVENTURE ACTIVITIES offers you a tour by air.
B. SHARK CAGE DIVING SPECIAL IN GANSBAAI requires no diving experience.
C. HORSEBACK BEACH ADVENTURES reaches as far as 12 kilometers.
D. During TANDEM SKYDIVING, you can operate the parachute.