①过点P作PQ∥CD，交AB于点Q；

②过点P作PR⊥CD，垂足为R．

    Jay Zhou is a student from Number 2 Middle School, who has many hobbies. He likes reading very much. In order to read more English novels, he has taken ____ in different reading activities. The novels he has read add ____ to at least 30. Many of the novels he has read ____ (base) on real people and events. Through reading, he can not only improve his knowledge of English, but also feel life is so happy. He says that so many English novels are worth ____ (read) that he will never be ____ (concern) about whether his future life will be boring. He also likes traveling. After ____ (graduate), he will travel in an English speaking country, making good use ____ his English. He hopes to speak English fluently as ____ he were a native speaker. Although he is devoted to ____ (learn) English，he hopes he ____ (admit) to a university where he can study science instead of arts.

我会认，我会选。

yǔ sǎn____         shàn zi____     shù yè____

A、树叶         B、扇子        C、雨伞

    It was one of the hottest days of the dry season. We had not seen rain 1 almost a month. The crops were dying. If we 2see some rain soon, we would lose everything.

    I was making lunch in the kitchen when I saw my3 son, Billy, walking towards the woods. He was walking with a great effort... trying to be as still as possible. Minutes later, he was once again walking towards the woods. I4 stand it any longer. I went out of the house and followed him.

    He was cupping both hands in front of him as he walked, being very careful not to spill (溢出）the water he carried.

    As I came closer, I saw 5 sight. Several large deer stood in front of him. Billy walked straight up to them. I almost screamed for him to get away. But the deer 6 hurt him nor even moved as Billy got down. And then I saw a baby deer7on the ground, thirsty, lift its head to lap up(舔) the water in my boy's hands. When the water was gone, Billy jumped up to run back to the house. I followed him back to a tap. Billy opened it and let the drip slowly fill up his “cup”.

    8he stood up and began to turn back, I was there in front of him. His little eyes9with tears. Very quickly, he explained10he was not wasting water. The week before, he had made 11 same trouble with our horses,12caused him a lecture from his father about the importance of not wasting water.

    This time, I joined him, with a small pot of water from the kitchen. I let him 13 the baby deer alone , for it was 14job. As the tears that rolled down my face began to hit the ground, they 15 by other drops... more drops... and more. I looked up at the sky. All I can say is that the rain came that day saved our farm, just like the actions of one little boy saved the little deer.

某化学兴趣小组按以下步骤探究温度下氯化钠溶液的酸碱性强弱．

【猜想或假设】溶液的pH可能为①pH＜7，②pH＞7，③pH=7．