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问题 单项选择题

在健康保险中，专门向被保险人提供医疗费用保障的保险被称为______。

A．补偿保险 B．给付保险
C．医疗保险
D．收入保险

答案

参考答案：C

填空题
从方框中选词，并用其
        there be, have got, some, friend, photo
Dear Jenny,
        Thank you for your last email. How is everything in China? How many students 1. _____ in your class? Have
you got    2._____ new friends? I 3. _____ a new teacher-Mr Green. His daughter and son are my good 4. _____ .
Do you like China? Do you like your school? Please send(发送)an email to me and send me some 5. _____ of your
school. Thanks.
                                                                                                                                                                                       Yours, 
                                                                                                                                                                                        Bill
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选择题

今年南京雾霾较严重．二氧化物传感器能用于雾霾浓度的检测，它的原理是其电阻随雾霾浓度的增大而减小．若将二氧化物传感器接入如图所示的电路中，当二氧化物传感器所处空间的雾霾浓度增大时，电压表示数U与电流表示数I发生变化，其中正确的是（　　）

A．U变小，I变小

B．U变大，I变大

C．U变小，I变大

D．U变大，I变小
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