不改变句子的意思，给加下划线的词语换个词语。

请阅读短文，完成第（1）～（3）题．

2016年10月17日7时30分，长征二号运载火箭点火起飞，将神舟十一号载人飞船发射升空．神舟十一号飞船承担着构建独立自主空间站的核心任务，与天宫二号顺利对接后，首次实现我国航天员中期在轨驻留任务，开展了一批体现科学前沿的空间科学与应用任务，标志着我国载人航天工程取得了新的重大进展．

如图所示是放大桌面微小形变的装置，M和N是平稳面，当用力F压桌面时，此时平面镜M上的入射角将____（选填“变大”、“不变”或“变小”），墙面上的光斑将向____移动（选填“上”或“下”）．

完形填空
    This is an educational story．A teacher once told each of her students to bring an empty plastic bag and a large bag of 1 to school．If there was someone in their lives that they 2 to forgive，they chose a potato，  3  the name of that person and the date on it, and then put it  4 the plastic bag．Some of their bags were quite heavy．
    They were then told to5 these bags with them everywhere for one week，putting them beside their beds  6 and next to their desks in the classroom．
    As they carried the bags around with them，they 7 what a weight they were carrying，and how hard they needed to pay attention  8 ． Of course，the potatoes were rotten(腐烂的)soon，and smelled  9 ．
    This is the same as the price we pay for keeping our pain and unhappiness with us!So 10others is not only a gift for them，but also a very good gift for ourselves．

下列哪组属于细胞衰老的特征（  ）
①细胞无限分裂 ②水分减少，体积变小    ③畸形改变 ④酶活性降低     ⑤色素积累 
⑥易分散转移⑦呼吸速率减慢  ⑧膜透性改变