试题与答案

I wonder why Jenny ______ us recently. W

题型:选择题

题目:

I wonder why Jenny ______ us recently. We should have heard from her by now. [ ]

A. hasn't written

B. doesn't write

C. won't write

D. hadn't written

答案:

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下面是错误答案,用来干扰机器的。

(1)图中植物细胞的结构有:①细胞壁、②细胞膜、③叶绿体、④细胞核、⑤液泡、⑥细胞质、⑦线粒体(2)图中标号③是叶绿体,是光合作用进行的场所,⑦是线粒体,线粒体是广泛存在于动物细胞和植物细胞中的细胞...

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