发生冒顶事故，处理前，矿山救护队应作好的准备工作（） A.处理冒顶事故以前，矿山救护

下列实例中不能反映生物影响环境的是（　　）

A．森林净化空气，调节气候

B．蚯蚓疏松土壤，增加土壤肥力

C．浮游生物大量繁殖，导致水质恶化

D．蚂蚁搬家

选词填空。

go ahead,    by accident,    account for,    to be honest,    even if, get into trouble,    be lost in,    do with,    take a chance,    be about to l. They _____ get down the hill when suddenly it began to rain heavily. 2. My brother never misses a class _____ he is ill and has a high fever. 3. The girl _____ so _____ listening to music that she forgot the meeting. 4. There is so much rubbish here that I really don't know what _____ it. 5. Though he was told it was hard to find a job there, he still decided to_____. 6. — I wonder if I could use your typewriter?     — Sure, _____. 7. — How did you find this important letter?     — Quite _____. 8. He has been asked to _____ his absence. 9. If you don't listen to the teacher's advice, you will _____. 10. _____, I don't like the way he does things.

如图所示，理想变压器的原线圈匝数为n₁=l000匝，副线圈匝数为n₂=200匝，交变电源的电动势e=220

2

sin314tV，电阻R=88Ω，电流表和电压表对电路的影响忽略不计，下列结论正确的是（　　）

A．电压表V₁的示数为311V

B．电压表V₂的示数为62V

C．电流表A₁的示数为0.10A

D．电流表A₂的示数为0.35A

西安半坡村陶器，上面有仰韶文化时期的符号（）个。是目前发现最原始文字。郭沫若称：中国原始文字的（）。

押韵的常见方式有：偶韵，即（）押韵，隔句押韵。排韵，即（）押一韵，或“一韵到底”。