问题
选择题
| 一束激光以入射角i=30°照射液面，其反射光在固定的水平光屏上形成光斑B，如图所示，如果反射光斑位置向右移动了2cm，说明液面（ ） A．上升了 B．上升了 C．下降了 D．下降了  |
cm
cm
cm
cm
答案
答案：D
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| 一束激光以入射角i=30°照射液面，其反射光在固定的水平光屏上形成光斑B，如图所示，如果反射光斑位置向右移动了2cm，说明液面（ ） A．上升了 B．上升了 C．下降了 D．下降了 |
答案：D
完形填空。（10分） Bruce is only an 8 years old boy.He loves the 33 very much.Many students in his class have pets(宠物), 34 he doesn’t have one.So he wants his mother to buy him a 35 .It’s Sunday today.Bruce and his mother go shopping.Bruce asks,”Mom,could you buy me a pet?” “Let me see…What pet do you 36 ?”his mother asks. “I want a 37 .I like it very much.” “Oh,dear.You can’t have a pet monkey.It will 38 your bananas.” “How about a panda?It’s cute.It’s my 39 animal.” “A panda?No.It will drink your milk.” “Well,”Bruce 40 a moment(一会儿).”Oh,I can have a pet elephant.It can’t drink my milk.It is very kind,too.” “It’s so 41 and we don’t have a big room for it,”says his mother.”You can have a pet.It isn’t big,and it can’t drink your milk or eat your bananas.” “Well,I know.” “ 42 is it,my dear?” “Dad!Bruce says happily.
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