判断题

不同类型的飞机飞行品质的要求是相同的

答案：错误

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单项选择题

This musical piece is ______.

A、Autumn Moon over the Han Palace
B、The Grievance of Zhaojun
C、To Mail a Letter by Wild Goose
D、A Song of Hovering Phoenix

单项选择题

The traditional techniques of solvent extraction of plant materials are mostly based on the correct choice of solvents and the use of heat or/and agitation to increase the solubility of the desired compounds and improve the mass transfer.

A．对
B．错