问题
单项选择题 B型题
猩红热（）
A.发热3～4天，热退疹出
B.发热当天出疹，之后伴有水疱疹
C.发热1～2天后出斑丘疹，枕后淋巴结肿大
D.发热3～4天后出斑丘疹，疹退后米糠样脱屑，色素沉着
E.发热后第2天出疹，全身皮肤充血，疹退后有大片脱皮
答案
参考答案：E
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猩红热（）
A.发热3～4天，热退疹出
B.发热当天出疹，之后伴有水疱疹
C.发热1～2天后出斑丘疹，枕后淋巴结肿大
D.发热3～4天后出斑丘疹，疹退后米糠样脱屑，色素沉着
E.发热后第2天出疹，全身皮肤充血，疹退后有大片脱皮
参考答案：E
| 完形填空。 | |||
| Even if you are a good high-jumper, you can jump only about seven __1__ off the ground. You cannot jump any higher because the earth __2__ you hard. The pull of the earth is__3__ gravity (引力). You can easily __4__ out the pull of the earth. If you weigh __5__ , you will know how__6__ gravity is pulling you. Since there is gravity, water runs downhill. when you__7_ a ball into the air, it falls back down. Because of gravity, you do not fall off the earth __8__ it turns around. Then, can you get __9__ from the earth and go far out into space? Now you can do it, because spaceships have been invented. The spaceship will go fast that it can get rid of (除掉) the earth's gravity and __10__ you into space. | |||
| ( ) 1. A. kilometer ( ) 2. A. pulls ( ) 3. A. said ( ) 4. A. find ( ) 5. A. myself ( ) 6. A. much ( ) 7. A. fly ( ) 8. A. as ( ) 9. A. off ( ) 10. A. get | B. foot B. push B. called B. look B. yourselves B. many B. throw B. and B. away B. bring | C. feet C. makes C. told C. saw C. you C. heavy C. get C. because C. lost C. carry | D. kilometers D. hits D. spoken D. watch D. yourself D. long D. make D. or D. left D. throw |
用如图所示装置进行下列实验，实验结果与预测的现象不一致的是( )
| ①中的物质 | ②中的物质 | 预测①的现象 | |
| A | 淀粉KI溶液 | 浓硝酸 | 无明显变化 |
| B | 酚酞溶液 | 浓盐酸 | 无明显变化 |
| C | AlCl3溶液 | 浓氨水 | 有白色沉淀 |
| D | 湿润红纸条 | 饱和氯水 | 红纸条褪色 |