填一填

       ____－____＝____

（1）下列实验操作中，错误的是　 ____　（填序号，下同）

①用10mL量筒量取6.4mL盐酸；

②切割金属钠时，将残留物放入废物缸中；

③配制FeSO₄溶液时一般要加入适量铁屑；

④配制一定物质的量浓度的溶液定容时仰视读数会使所配溶液浓度偏高；

⑤不慎接触过多的氨，应及时吸入新鲜的空气和水蒸气，并用大量水冲洗眼睛；

⑥用带橡皮塞的棕色试剂瓶存放浓HNO₃；

⑦稀释浓硫酸时应把水倒入浓硫酸中．

（2）如图为实验室制H₂的装置．若液面刚好不与锌粒接触而又无酸液可加入，则可以从长颈漏斗中加入适量试剂是　 ____

①食盐水         ②苯           ③四氯化碳④Na₂CO₃溶液    ⑤硫酸铜溶液   ⑥KNO₃溶液．

    My name is Sally Miller. I am a student in No. 3 Middle School. Look! This is a ruler. It's yellow. It's not my ruler. Who lost it?

    “Anna, is this your ruler?” I ask my friend.

    “No, it isn't. My ruler is white. And it's in my pencil box now,” Anna answers.

    “Excuse me, Jack. Is this your ruler?”

    “No, it isn't. My ruler is black.” Jack answers.

    “You can ask your cousin Jenny. She can't find her ruler.”

    “Hi, Jenny! Is this your ruler?” I ask.

    “Yes, it's mine. Thank you very much,” Jenny says. She is very happy to find her ruler.