题目

选择合适的单词补全句子 A. his B. eye C. head D. arm E. leg (1) This is (他的) hand. (2) Point to your (眼睛). (3) This is her (腿). (4) This is my (胳膊). (5) Point to your (头). 答案:【1】A 【1】B 【1】E 【1】D 【1】C如图,梯形ABCD中,AD∥BC,AC、BD相交于点O,且AD=1,BC=3,则S△AOD:S△AOB=    .
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