单项选择题

Housekeeping involves cooking, washing dishes, sweeping, and cleaning.

A．includes
B．is equal to
C．means
D．excludes

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絮凝和反絮凝现象从本质上说是由于微粒的何种性质引起的
A、热力学性质
B、动力学性质
C、光学性质
D、电学性质

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Don't just believe the advertisement .That kind of camera is _____it says.
A、not as good as
B、as good as
C、as well as
D、not as well as