下列有关化学用语正确的是 A．质子数为17、中子数为20的核素1737Cl B．

读拼音，按要求填空。

kōng zhōng yì zhī niǎo，bèi rén yòng xiàn lā，bú pà fēng er chuī，zhǐ pà yǔ er lín。

1．三拼音节：_____、_____

2．带有后鼻韵母的音节：_____、_____、_____、_____

3．它是___________。（打一物品）

第三节语法填空 (共10小题，每小题1.5分，满分15分)

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为51～60的相应位置上。

Last year, I read a “ Happy Ad” in the local newspaper. There was a lady in a local nursing home, ___51__ was celebrating her 90th birthday. Her family wanted some warmed-hearted people to drop her a line. So I found a card and dropped her a short note, ______52______(wish) her a happy birthday. A week later, someone knocked at my door. I opened the door and found __53______ middle aged man standing on the doorstep. He introduced _____54______ as the son of the woman  ____55____whom I had sent the card. He explained that he just wanted to thank me _____56____  sending such a nice card to his mom. Apparently, she did not receive much mail and was excited _____57_____(receive) mine. I just didn’t know what to say. I told him it was my ______58_____(please) and that I hoped his mom had enjoyed her birthday.

The old lady ____59____ (pass) away shortly after that. I had never met this lady, but I kept her and her family in my mind. I dropped them a line of sympathy. All I hoped was ____60_____ my note was enough to brighten a couple of her days on the Earth.

读右侧两表，完成：

(1)历史上黄河的决口频率与森林覆盖率有何关系？

(2)绘出历史时期决口频率和森林覆盖率的变化曲线图。

(14分)三氧化二镍是一种重要的电子元件材料、蓄电池材料。工业上利用含镍废料（镍铁钙镁合金为主）制取草酸镍，再高温煅烧草酸镍制取三氧化二镍。已知草酸的钙、镁、镍盐难溶于水。根据下列工艺流程示意图回答问题。

(1)生产过程中多次进行过滤。实验室进行过滤操作中用到玻璃棒，玻璃棒的作用是         。

(2)加入过氧化氢后缓慢加入碳酸钠溶液调pH至4.0~4.5左右，加入碳酸钠溶液的作用是                     。再加入NH₄F的目的是                    。

(3)草酸镍（NiC₂O₄·2H₂O）在热空气中干燥脱水后在高温下煅烧三小时，制得三氧化二镍，同时获得一种混合气体。写出草酸镍受热分解的化学方程式               。

(4)工业上还可用电解法制取三氧化二镍。用NaOH溶液调节NiCl₂溶液pH至7.5，加入适量硫酸钠后采用惰性电极进行电解。电解过程中产生的Cl₂有80%在弱碱性条件下生成ClO^－，再把二价镍氧化为三价镍。写出ClO^－氧化Ni(OH)₂生成三氧化二镍的离子方程式                       。a mol二价镍全部转化为三价镍时，外电路中通过电子的物质的量是     。

(5)电解法制取三氧化二镍实际过程中，有时获得一种结晶水合物，已知1mol该物质中含有0.5 mol结晶水。取该化合物20.2 g进行充分加热，而获得三氧化二镍固体和0.2 mol水，则该结晶水合物的化学式为       。

氢氧化铝属

A．H1受体阻断药B．H2受体阻断药C．胃壁细胞H+泵抑制药D．M受体阻断药
E．抗酸药