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问题 选择题

图中的虚线框中是某个光学元件，下面说法中正确的是（　　）

A．光学元件是凹透镜

B．光学元件是凸透镜

C．光学元件是厚玻璃

D．光学元件是平面镜

答案

由图可知，光线透过元件，变得会聚，不能是平面镜、厚玻璃，而应是凸透镜，故B正确、ACD错．

故选B．

听力题

My younger brother is n___1____ clever. He can’t r___2_____ to questions right. My parents are worried about him. One day, I took him to a zoo. Then I asked him three questions. The first question was “What did you see in the zoo?”, the second question was “Who often gives you money?” and the third was “What did you have for your breakfast?”. He couldn’t answer a____3_____ of them. Then I told him again and again, the first answer is “elephants and bears”, the second answer is “my father and my brother” and the third answer is “bread and milk”. Then he retold(复述)the questions and answers. In the e__4____ I asked the three questions a___5___. He could give the right a___6____:1. elephants and bears, 2.my father and brother, 3.bread and milk. I was very s___7_____ with him.

When we g___8____ home, I told my parents that my brother could answer my questions c__9_____. Then I began to ask him, “What did you see in the zoo?” “Bread and milk.” “Who often gives you money?” “Elephants and bears.” “What did you have for breakfast?” Cried I a__10____. “My father and brother”, he answered.
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单项选择题 A1型题

2岁儿童食欲差，消瘦，经常感冒发热，检查发现该儿童的年龄别身高低于同年龄、同性别参照人群值的正常范围，属于营养不良，应该首先采取的治疗方案是（）

A.及时纠正水和电解质紊乱

B.补充维生素和矿物质

C.逐渐增加能量和蛋白质的供给

D.查明病因，治疗原发病

E.增加动物性食物的摄入
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