良好的家居环境表现在（    ）

关于太阳活动的正确叙述是（   ）

阅读下列材料，从A、B、C三个选项中，选出最佳选项回答问题或完成句子.
    Miss Miller, The English Teacher wants to know about her students. She asks them some questions. The next are some of the students' answers(回答):

First name: Grace       Last name: Smith           Class: 1 School things: 2dictionaries, 4 pencil boxes, 8 notebooks

First name: Tony        Last name: Green          Class: 2 Things and positions: Watch: on the table        Volleyballs: under the desk Keys: in the schoolbag      Computer games: on the sofa

First name: Alice          Last name: Smith         Class: 3 Likes: apples, carrots, chicken, strawberries Doesn't like: bananas, salad, ice-cream

Na₂S_x在碱性溶液中可被NaClO氧化为Na₂SO₄，而NaClO被还原为NaCl，若反应中Na₂S_x与NaClO的物质的量之比为1:16，则x的值是

      古诗文阅读—

                                                                               《清平乐·村居》 辛弃疾
                                                           茅檐低小，溪上青青草。醉里吴音相媚好，白发谁家翁媪。
                                                           大儿锄豆溪东，中儿正织鸡笼，最喜小儿无赖，溪头卧剥莲蓬。