十八届五中全会决定，全面放开二孩政策，一对夫妇可生育两个孩子。下列对全面放开二孩政策理解不正确的是（    ）

阅读下面短文，将短文中画线部分的句子翻译成中文
                                                                                How Much Water Is Needed a Day?
   Many people think they should drink eight glasses of water a day．Why? Because that is what they have been told all their life．But a new report on science gives some different suggestions：people should drink according to their bodies．____ They should drink as much water as they would like to drink．
   The report says most people meet their daily needs for water by letting thirst be their guide．It also gives people some good suggestions：women should get about 2.7 liters（升）of water every day，while men should get about 3.7 liters．
   There is an important difference．____ The report doesn’t tell people how many glasses of water to drink．Instead，the experts say it may not be possible to know how many glasses people really need．This is because the daily want of water can include the water in foods．

—It _______ food every four hours.

晓松在参观一个容积为5×10³m³ 粮仓时，想知道这粮仓能装多少质量的稻谷，于是他取一小包稻谷作样品，进行了以下实验：
（1）调节天平平衡时，发现天平的指针偏向分度标尺的右侧，此时，应将平衡螺母向____ （填“左”或“右”）调，直至天平平衡。
（2）取适量稻谷倒入左盘，在右盘中加减砝码，并移动称量标尺上的____ ，使天平重新平衡，所用的砝码和游码的位置如图所示，则稻谷质量为____ g，将这些稻谷倒入量筒中压实，测出它的体积为40 cm³。
（3）稻谷的密度为____ g/cm³，这个粮仓大约能装____ kg的稻谷。