单项选择题

Who is the author's intended audience

A．Working women who have no time for cooking.
B．Husbands and children of working women.
C．Working women who must travel on their own.
D．Hotel personnel who must attend to working women.

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热门试题

单项选择题

If an object weighed one pound 8,000 miles above the earth, it would weigh ______ on the surface of the earth.

A．6 pounds
B．4 pounds
C．9 pounds
D．1/9 pound

单项选择题

If the distance between two objects is shortened by half, their gravitational attraction will______.

A．double
B．become four times stronger
C．be the same
D．get four times weaker