题目内容

In 1969, Neil Armstrong took a "great ________ for mankind" out of Apollo 11 and onto the moon.

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I'm really longing for working for that company since it offers a reasonable salary and a _________ working time.

Many personnel managers say it is getting harder and harder to ___________ honest applicants from the growing number of dishonest ones.

The great man has _______ for a united country and urged for peace.

问题一中第三种规格的佐料能由前两种规格的佐料按照（）比例配制而成？

A. 2:1
B. 1:3
C. 3:1
D. 1:2