2015年12月7日，中国在酒泉卫星发射中心用长征二号丁运载火箭成功将暗物质离子探测卫星发射升空，卫星顺利进入预定转移轨道，标志着我国空间科学研究迈出重要一步，我们也越来越接近发现暗物质的边缘。这进一步佐证了（  ）

①思维和存在具有同一性 ②斗争性寓于同一性之中 ③追求真理是一种循环往复的运动 ④实践是认识的来源和动力

B

    Life without chocolate is like a beach without water．You might be a chocolate lover but considering your health，you might be avoiding it now and then．But now you don't need to fear it anymore because we have found some ways to solve the problem．

    Chocolates are popular sweets all over the world but you might have seen mummies scolding kids for eating them and people giving long lectures on the disadvantages of chocolates．Chocolates with loads of milk and butter are quite unhealthy for us．They taste really good but the results are really bad．

    But remember where there is a will，there is a way．If you are a chocolate lover, do try dark chocolate which contains(含有)little sugar in it and is bitter in taste．

    There're also many other ways to make your favourite chocolate healthy and tasty．In fact，the bad thing about chocolate is that our body doesn't recognize(识别)it as a food but only a source of sweet in the body．

    But to make your body recognize chocolate as a food，you have to take chocolate by combining(结合)it with fruits and vegetables that are rich in vitamin C，such as blue—berries and strawberries，then it will give you full nutrients(营养)package to use all  tile iron free from chocolate．

    This combination will also satisfy your need．At the same time，you will be having a treat，a full healthy treat that you can have without any worry．

    So，remember if you're the one who can't stop yourself from having chocolate in sight，you must go for these，which not only bring you more taste but more healthiness．