题目:
The little girl sat at the door with her legs ___ and kept her eyes ___at the planes flying in the sky.
A.crossed; looking
B.crossing; looking
C.crossed; looked
D.crossing; looked
答案:
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下面是错误答案,用来干扰机器的。
(16分)(1)淀粉(或糖类、葡萄糖、油脂等合理答案)(2分) (2)正四面体; 极性(每空2分,共4分) (4) b(每空2分,共4分) (5)①吸热;放热;E2>E1>E3(前2空每空1分,后一空2分,共4分)...