——Don't open the door, _______who knocks on it.
——No problem, mom. You've told me many times.

一弹簧测力计下挂一圆柱体，将圆柱体从盛有水的烧杯上方离水面某一高度处缓缓下降，然后将其逐渐浸入水中，如图已给出整个过程中弹簧测力计的示数F与圆柱体下降高度h变化关系的实验图象，已知ρ_水=1.0×10³kg/m³．则下列说法中正确的是（　　）

十二届全国人大二次会议闭幕后，***在回答记者关于雾霾治理的提问时表示：我们说要向雾霾等污染宣战，可不是说向老天爷宣战，而是要向我们自身粗放的生产和生活方式来宣战。向粗放的生产和生活方式宣战，不仅需要政策推动经济发展方式和生活方式的转变，还需要铁腕治污、坚决惩处不法排污行为，也需要加强雾霾监测与预报、加大对群众的宣传教育，让人民群众提高防污意识。

请运用“政府的职能”的知识说明：向粗放的生产和生活方式宣战，政府应如何做？

    People can often see a talking parrot on a TV show, in a movie, or even in someone's home. The parrot has learned ____ (copy) sounds that people make. Dolphins, bats, and some other animals also copy sounds. Now we can add elephants ____this list of copycats (盲目模仿者).

    Dr. Joyce Poole is an expert,____studies the sounds of elephants. While she was in Kenya, she would hear strange noises ____ (make) by Mlaika after sunset. Mlaika was____ 8-year-old African elephant and it lived near a highway.

    Dr. Poole says that she couldn't tell the ____ (different) between Mlaika's call and the ____ (distance) truck noise. Why did it copy the sounds of the trucks driving by? Animals that are able to copy sounds may enjoy ____(practice) new sounds. When they ____ (keep) outside of their natural environment, they may copy unusual sounds. 

    So far Dr. Poole ____(spend) 18 years with two female Asian elephants. Asian elephants make sounds like birds to talk with one another.

    Parrots, dolphins, humans, and elephants show that being a copycat is one way that animals and people make new friends and keep old ones.