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Short conversation 4[音频]

A business idea brought forth by an airline.
B. How to share online profiles to look for a potential relationship.
C. A dating progam which helps people look for a partner online.
D. The in-flight online service offered by an airline.

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Short conversation 5[音频]

A. She suggests the man shoot video for people online.
B. She suggests the man quit the online business.
C. She suggests the man start a video store online.
D. She suggests the man edit videos for people online.

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正弦波自激振荡器振荡建立过程，晶体管的工作状态是（）

A. 甲类
B. 甲乙类
C. 丙类
D. 甲类－>甲乙类－>丙类

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正弦波振荡器是不需要输入信号控制就能自动地将直流能量转换为特定频率和振幅的正弦交变能量的电路

A. 对
B. 错

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Nowadays, travelers arriving at the airport arewelcomed by 11 tall earthen mounds (土堆)，the _1 of emperors in Western HanDynasty(朝代), built around the 1st century.Thus the year 841 BC marked the beginning of _2_ and 3__ recordkeeping.The beacon tower (烽火台) above the LishanMountain, where Huaqing Hot Spring islocated, is an _4_ reminder of thestory of “the most expensive smile” that caused the5 of the dynasty.It exhibits over 3,000 historical 6,the main attractions being the bronze ware (青铜器), ceramics(陶瓷制品) and beautiful wallpaintings from the Tang Dynasty tombs.

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Short conversation 4[音频]

A business idea brought forth by an airline. B. How to share online profiles to look for a potential relationship. C. A dating progam which helps people look for a partner online. D. The in-flight online service offered by an airline.

Short conversation 5[音频]

正弦波自激振荡器振荡建立过程，晶体管的工作状态是（）

正弦波振荡器是不需要输入信号控制就能自动地将直流能量转换为特定频率和振幅的正弦交变能量的电路

A business idea brought forth by an airline.
B. How to share online profiles to look for a potential relationship.
C. A dating progam which helps people look for a partner online.
D. The in-flight online service offered by an airline.