小红同学在做“探究平面镜成像”的实验时，将一块玻璃板竖直架在水平台上，再取两段完全相同的蜡烛A和B，点燃玻璃板前的蜡烛A，进行观察，如图所示，在此实验中：
（1）小红选择玻璃板代替镜子进行实验的目的是__________ 。
（2）所用刻度尺的作用是便于比较像与物________关系。
（3）取两段完全相同的蜡烛是为了比较像与物的__________关系。
（4）移去后面的蜡烛B，并在其所在位置上放一光屏，则光屏上__________接收到蜡烛烛焰的像（填“能”或“不能”），所以平面镜所成的像是__________像（填“虚”或“实”）。
（5）小红将蜡烛逐渐远离玻璃板时，它的像__________ （填“变大”、“变小”或“不变”）。
（1）能准确找到像的位置（透光、成像）
（2）到平面镜的距离
（3）大小
（4）不能，虚
（5）不变
根据短文内容 ，从短文后的选项中选出能填入空白处的最佳答案，选项中有两项为多余选项。 Why is setting goals important? 1 Instead of just letting life happen to you, goals allow you to make your life happen. Successful people imagine how their life should be and set lots of goals. 2 .It’s like having a map to show you where you want to go. Thank of it this way. There are two drivers. One has a destination (目的地) in mind which can be found on a map. She can drive straight there without any wasted time or wrong turns. The other driver has no goal or destination or map. She starts off at the same time from the same place as the first driver, but she drives aimlessly around, never getting anywhere, just using up gas. Which driver do you want to be? 3 . They decide what they want in life and then get there by making plans and setting goals. Unsuccessful people just let life happen by accident. Goals aren’t difficult to set and they aren’t difficult to reach . 4 . You are the one who must decide what to achieve and in what direction to aim your life. 5 . Written goals can be reviewed regularly, and have more power. Like a contract (合同) with yourself, they are harder to neglect or forget. Also when you write your goals in a particularly way, you are able to make yourself know situations that will bring you nearer to your goal.
|
、深覆盖