单项选择题

The process of dividing members of the population into homogeneous subgroups before sampling is______.

A. random sampling
B. stratified sampling
C. systematic sampling
D. simple sampling
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单项选择题
Which is the largest in size among the four countries below
A. America.

B. Australia.
C. Canada.

D. China.
单项选择题
In writing, ______refers to series of words that begin with the same consonant or sound alike.
A. alliteration

B. anacoluthon
C. anadiplosis

D. anaphora
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