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问题 解答题
人站在距地面h千米的高处，能看到的最远距离d≈112
h
（单位：米）．上海“东方明珠”太空舱距地面的高度约为400米，如果没有障碍物的影响，那么站在太空舱的人可以看到的距离有多远？
答案

根据题意，400米=0.4千米．（2分）

所以d≈112

0.4
（千米）．（2分）

答：站在太空舱的人可以看到的距离约有112

0.4
千米．（2分）

单项选择题

冰片、樟脑、薄荷脑等药物粉碎应采用的方法为（）

A．串料

B．串油

C．单独粉碎

D．水飞

E．加液研磨
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单项选择题

The United States is well known for its network of major highways designed to help a driver get from one place to another in the shortest possible time.Although these wide modem roads are generally (1) and well maintained, with few sharp curves and straight sections, a direct route is not always the most (2) one. Large highways often pass (3) scenic areas and interesting small towns. Furthermore, these highways generally (4) large urban centers, which means that they become crowded with heavy traffic during rush hours, (5) the" fast, direct" route becomes a very slow route.However,there is almost always another route to take if you are not in a hurry. Not far from the (6) new" superhighways", there are often older, (7) heavily traveled roads which go through the countrvside. (8) of these are good two-lane roads ; others are uneven roads curving through the country. These secondary routes may go up steep slopes, along high cliffs, or down frightening hillside to towns (9) in deep valleys. Through these less direct routes, longer and slower, they generally go to places (10) the air is clean and scenery is beautiful, and the driver may have a chance to get a fresh, clean view of the world.

 

第（9）空应选择（）

A．lying

B．laying

C．laid

D．lied
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