题目内容

Passage Two Questions 30 to 32 are based on the passage you have just heard.

A. It produced the best typewriter in the world.
B. It designed the world’s first mainframe computer.
C. it exported more typewriters than computers.
D. It has five independent companies with its head office in Ivrea.

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Passage Two Questions 30 to 32 are based on the passage you have just heard.

A. The origin of Olivetti. B. The success of Olivetti.
B. C. The history of Olivetti. D. The production of Olivetti.

If you can provide satisfactory after-sale service, your products will surely have a wide market here.

Passage Three Questions 33 to 35 are based on the passage you have just heard.

A. Sex.
B. Educational background.
C. Social status.
D. Personal style.

安全阀定压Ps为1.52 MPa,天然气泄放量为1.5×104m3/h,温度18℃,选用弹簧全启式安全阀,则天然气定容比热容为( )。 (天然气摩尔成分CH4:96%,C2H6:0.8%,C3H8:0.2%,CO2:2.8 %,N:0.2%)(K取0.7,Z=0.97)

A. 0.98 kJ/(m3·
B. 1.06 kJ/(m3·
C. 1.19 kJ/(m3·
D. 1.56 kJ/(m3·

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