It’s time for class. Let’s stop . Look! The teacher decides us something important.
| A.talk, tell | B.talking, telling | C.to talk, to tell | D.talking, to tell |
The meat is expensive and eating meat is bad for your health.
| A.too much, much too | B.too much, too much |
| C.much too, too much | D.much too, much too |
Jenny the USA the day after tomorrow, because she is going to the school there.
| A.left to | B.leaves for | C.is leaving to | D.is leaving for |
—What else do you want for the dinner?
— else. I don’t think I can eat more.
— else. I don’t think I can eat more.
| A.Everything | B.Nothing | C.Anything | D.Something |
In North America, most students go to school ______ the school bus.
| A.on | B.in | C.by | D.take |
He moved here a week ago. So he has ______ good friends in this city.
| A.few | B.a few | C.little | D.a little |
几盏灯接入同一电路,其中一盏灯的灯丝断了不亮,其余几盏灯仍正常发光,则:
| A.坏的灯与其余的灯一定是并联的 | B.其余的灯一定是串联的 |
| C.坏的灯与其余的灯一定是串联的 | D.其余的灯一定是并联的 |
如图所示电路,电源两端电压保持不变,图中①、②、③是电流表或电压表。当开关S闭合后,两灯均发光,三个表均有示数。下列说法正确的是
| A.①、②可能同是电压表 |
| B.②、③可能同是电流表 |
| C.①、③不可能同是一种表 |
| D.②、③不可能同是一种表 |
电车的车门下通常挂一条铁链,在电车行驶的过程中,铁链是提起的而不与地面接触,当电车停车开门时,铁链下落与地面接触,这是因为( )
0 23359 23367 23373 23377 23383 23385 23389 23395 23397 23403 23409 23413 23415 23419 23425 23427 23433 23437 23439 23443 23445 23449 23451 23453 23454 23455 23457 23458 23459 23461 23463 23467 23469 23473 23475 23479 23485 23487 23493 23497 23499 23503 23509 23515 23517 23523 23527 23529 23535 23539 23545 23553 159627
| A.铁链与地面接触,可以增加地面与电车之间的摩擦,使电车尽快停下来 |
| B.铁链与地面碰撞发出响声,告知乘客电车已停稳 |
| C.铁链与地面接触,可以释放电车上由于摩擦积累的电荷,避免乘客上下时发生放电现象 |
| D.铁链与地面接触,可以摩擦起电,补充电车行驶时消耗的电能 |