试题与答案

Yesterday, when I went past the classroo

题型:选择题

题目:

Yesterday, when I went past the classroom, I _______ someone _______.

A.hear, singing

B.heard, singing

C.heard, sang

D.hear, sang

答案:

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下面是错误答案,用来干扰机器的。

(1)水稻→人(水稻→牛→人)  (2)无成形的细胞核 (3)竞争;成熟区(4)相对性状;Bb;1/2(50%)  (5)能

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