在探究“光反射时的规律”实验中，如图甲小华在纸板上用笔描出入射光EO和反射光OF的径迹，接着她把纸板NOF向前折或向后折（如图乙），在纸板上____（选填“能”或“不能”）看到反射光，由此得出反射光线、入射光线和法线____的结论。为了探究反射角与入射角的关系，实验时应多次改变 ____，测量出相关数据，分析得出结论。在图甲所示的实验中如果让光沿FO方向射到镜面，会发现反射光沿OE方向射出，这表明在反射现象中 ____。

下图为人体内某些信息分子作用的示意图，a、b、c、d表示信息分子，据图分析，下列叙述错误的是(　　)

阅读理解

    Today we are developing a new idea—Money is the measure of all things. More and more, people are being judged by what they own, and not by their good qualities. This is certainly true among many people in China.

    According to a survey that was done in 2013, China is the most materialistic(物欲的) country in the world. Twenty-three percent of Chinese said they measured success by the things they owned (cars, homes, jewelry, designer clothes) compared with just 21 percent in America, 20 percent in Canada, and 16 percent in Britain.

    This love of materialistic has spread into schools where some kids like to show off their Apple Watches, iPhone7 and expensive running shoes. Some poorer students now feel worried by their richer classmates and sad by their poor families. In some cases this has affected their performance in school.

    But having rich parents doesn't automatically(自动地) bring good grades and having poor parents doesn't certainly bring bad grades. It is hard wok that is the key to success, not the cost of your running shoes. And hard work is what develops good characters, not money, that should be the measure of all things.

下列说法：①若a≠0，m，n是任意整数，则a^m．aⁿ=a^m+n；②若a是有理数，m，n是整数，且mn＞0，则（a^m）ⁿ=a^mn；③若a≠b且ab≠0，则（a+b）⁰=1；④若a是自然数，则a^﹣3．a²=a^﹣1．其中，正确的是（   ）

下列哪个证据是最形象、直观说明地球的形状(     )