问题
选择题
— Where does his mother live ?
— She lives__________ Singapore .
[ ]
A. at
B. in
C. on
D. from
答案
答案：B
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— Where does his mother live ?
— She lives__________ Singapore .
[ ]
A. at
B. in
C. on
D. from
答案：B
支托的长度应为其近远中径的（）