根据短文理解，选择正确答案。

    Frederick was ill and went to the hospital. A doctor looked him over and said, "Well, Mr Green, you're going to get some injections(针), and you'll feel much better. A nurse will come and give you the first this evening, and you'll have to get another one tomorrow evening.'' In the evening a young nurse came to Frederick's bed and said to him. "I'm going to give you your first injection now, Mr Green. Where do you want it?"

    The old man was surprised. He looked at the nurse for a while, then he said, "Nobody has ever let me choose that before. Are you really going to let me choose now?"

    "Yes, Mr Green," the nurse answered. She was in a hurry, "Where do you want it?"

    "Well, then,'' the old man answered with a smile, "l want it in your left arm, please."

把下列词语补充完整。

____ ____粼粼     ____ ____私语

____无天____    笔____ 龙____

独____匠____     ____ ____共赏

妙____生____    引人____ ____

地球是人类的家园，太阳系是地球的家园，太阳及太阳活动对地球上的自然环境和人类生存具有重要的影响．阅读下列资料，回答问题．

表1：太阳系行星数据比较（部分）

如图所示，将一条形磁体放在小车上，并靠近螺线管。开关闭合，当变阻器滑片向右滑动时，发现小车也向右运动，则条形磁体的左端为____极，图中电阻R₂的作用是____，此时电流表的示数将____（填增大、减小或不变）。