测定土壤中细菌数量一般选用10⁴、10⁵和10⁶倍的稀释液进行平板培养，而测定真菌的数量一般选用10²、10³和10⁴倍稀释，其原因是（　　）

现在，我国机关事业单位工作人员与企业职工统一实行社会统筹和个人账户相结合的基本养老保险制度，改变了传统养老制度把城镇从业人员分为三六九等的不合理做法。这说明(　　)

①公民在法律面前一律平等的原则得到进一步贯彻

②改革有助于保障广大人民的经济权益

③公民的任何权利都应当受到国家保护

④公民在政治权利方面平等地享有基本的民主权利

    Today I'd like to tell you a little about the people I admire the most.

    My first hero is the adventure Jessica Watson. In October 2009, when she was only sixteen years old, Jessica left Sydeney, Australia and sailed ____the Pacific, Atlantic and India Oceans all by herself. She ____to Sydney in May 2010. She is the youngest person to sail solo unsupported around the world. I have a lot of respect for her as she was ____to face difficulties and danger alone. Australians were so ____her that they called her "our newest Australian hero."

已知函数$f\left(x\right)=\left\{\begin{array}{c}0,x\le 0\\ e^x,x>0\end{array}\right.$，则使函数g（x）＝f（x）＋x－m有零点的实数m的取值范围是(    ）