(时间:120分钟满分 150分) 一、填空:(每小题3分,满分36分) 1、如果收入15元记作+15元,那么支出20元记作______元。 2、如图1所示,两温度计读数分别为我国某地今年2月份某天的最低气温与最高气温,那么这天的最高气温比最低气温高______。 3．有一个密码系统,其原理由下面的框图所示: 输入x→x+6→输出当输出为10时,则输入的x=______。 4、如图2,C是⊙O上一点,O是圆心,若∠C=35°,则∠AOB的度数为______。 (Time: 120 minutes out of 150 points) First, fill in the blank: (3 points for each question, out of 36 points) 1, if the income of 15 yuan is recorded as +15 yuan, then the cost of 20 yuan was recorded as ______ yuan. 2. As shown in Figure 1, the readings of the two thermometers are the minimum and maximum temperatures for a place in China in February of this year. Then the highest temperature on this day is ______ higher than the minimum temperature. 3. There is a cryptosystem whose principle is illustrated by the following block diagram: Input x→x+6→Output When the output is 10, the input x=______. 4, as shown in Figure 2, C is a point on the ⊙O, O is the center of the circle, if ∠ C = 35 °, then ∠AOB degree is ______.