____ ____  ____  ____at school today?

从粮库取粮，第一次取出全部的 $\frac{1}{5}$ ，第二次取出200袋，第三次取出前两天总和的 $\frac{3}{4}$ ，还剩170袋，粮库原有粮____袋.

    The Americans were getting ready to send their first man to the moon, an old Irishman (爱尔兰人) was 1 them on TV in a hotel room. There was an Englishman in the room, 2. And he said to the Irishman, "The Americans are very 3, aren't they? They are going to 4 some men to the moon. It's a very long way from our world." "Oh, that's 5,"the Irishman answered quickly." "The Irishman are going to send some men to the sun in months' 6. That's much 7 away than the moon, you know. "The Englishman was very 8 when he heard this. "Oh, yes it is," he said, "But the sun is too 9 for people to visit."

    The Irishman laughed and answered, "Well, the Irish are clever, too, you know. We 10 go to the sun during the day, of course. We'll go there during the night."

“嫦娥一号”探月卫星在距月球表面200km高度经过多次“刹车制动”，最终绕月球做匀速圆周运动.卫星“刹车制动”时，沿与运动方向____ (选填“相同”或“相反”)的方向喷射高温气体，高温气体对卫星施加制动力，这说明力的作用是____的.