细胞内很多化学反应都是在生物膜上进行的，下图表示真核细胞中4种生物膜上发生的化学变化示意图，相关叙述不正确的是

A．①是内质网膜或核膜的外膜

B．②是高尔基体膜结构

C．③是叶绿体内膜

D．④是线粒体内膜

请用所给动词的适当形式填空。

1. We ______________ (have) a picnic tomorrow.

2. My brother ______________ (go) to Xi'an next Sunday.

3. What ______________ you ______________ (do) next weekend?  I______________ (collect) stamps.

4. Where ______________ she ______________ (work) next year?  She ______________ (work) in a

    computer company.

5. What ______________ you going to ______________ (buy) next holiday?  I ______________ (buy) some

    postcards for my friends.