本课配套习题挑战模式1/5
小明在一次军事夏令营活动中,进行打靶训练,在用枪瞄准目标点B时,要使眼睛O,准星A,目标B在同一条直线上,如图所示,在射击时,小明有轻微的抖动, 致使准星A偏离到A′,若OA=0.2米,OB=40米,AA′=0.0015米,则小明射击到的点B′偏离目标点B的长度BB′为( )
A: 3米 |
B: 0.3米 |
C: 0.03米 |
D: 0.2米 |
- 提示1:PHA+55Sx6aKY5oSP5Y+v55+l77yM5YeG5pif5ZKM6Z225piv5bmz6KGM55qE77yM5qC55o2u5Lik5LiJ6KeS5b2i55u45Ly877yM5a+55bqU6L655oiQ5q+U5L6L5YiX5pa556iL5Y2z5Y+v6Kej562ULjwvcD4=
- 答案:Qg==
PHA+6Kej77ya4oi1QUHigLLiiKVCQuKAsjxicj7iiLRPQe+8mk9CPUFB4oCy77yaQkLigLI8YnI+4oi0PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzlFL0UyL3JCQUNFMVBmQ0xyUmUya3JBQUFDZERESFdoazk0Ny5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvOUUvRTIvckJBQ0UxUGZDTHJSZTJrckFBQUNkRERIV2hrOTQ3LnBuZyIgaGVpZ2h0PSI0MiIgd2lkdGg9Ijg0Ij48YnI+6Kej5b6X77yaQkLigLI9MC4z57GzLjxicj7mlYXpgIlCLjwvcD4=
本课配套习题挑战模式2/5
如图,王华在地面上放置一个平面镜E来测量铁塔AB的高度,镜子与铁塔的距离EB=20米,镜子与王华的距离ED=2米时,王华刚好从镜子中看到铁塔顶端点A,已知王华的眼睛距地面的高度CD=1.5米,则铁塔AB的高度是( )
A: 15米 |
B: 米 |
C: 16米 |
D: 16.5米 |
- 提示1:PHA+5Yip55So6ZWc6Z2i5a+556ew77yM5rOo5oSP5a+75om+55u45Ly85LiJ6KeS5b2i77yM5qC55o2u5q+U5L6L5rGC5Ye6QUIuPC9wPg==
- 答案:QQ==
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
本课配套习题挑战模式3/5
如图,A﹑B两点分别位于一个池塘的两端,小明想用绳子测量A﹑B间的距离,但绳子不够,于是他想了一个办法:在地上取一点C,使它可以直接到达A﹑B两点,在AC的延长线上取一点D,使CD=CA,在BC的延长线上取一点E,使CE=CB,测得DE的长为5米,则AB两点间的距离为( )
A: 6米 |
B: 8米 |
C: 10米 |
D: 12米 |
- 提示1:PHA+5qC55o2u55u45Ly85b2i55qE5Yik5a6a5a6a55CG5Yik5pat5Ye64pazQUJD5ZKM4pazREVD55u45Ly877yM5YaN5qC55o2u5LiJ6KeS5b2i55u45Ly855qE5oCn6LSo6Kej562U5Y2z5Y+vLjwvcD4=
- 答案:Qw==
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
本课配套习题挑战模式4/5
如图,丁轩同学在晚上由路灯AC走向路灯BD,当他走到点P时,发现身后他影子的顶部刚好接触到路灯AC的底部,当他向前再步行20m到达Q点时,发现身 前他影子的顶部刚好接触到路灯BD的底部,已知丁轩同学的身高是1.5m,两个路灯的高度都是9m,则两路灯之间的距离是( )
A: 24m |
B: 25m |
C: 28m |
D: 30m |
- 提示1:PHA+55Sx5LqO5Lq65ZKM5Zyw6Z2i5piv5Z6C55u055qE77yM5Y2z5ZKM6Lev54Gv5bmz6KGM77yM5p6E5oiQ5Lik57uE55u45Ly8LiDmoLnmja7lr7nlupTovrnmiJDmr5TkvovvvIzliJfmlrnnqIvop6PnrZTljbPlj68uPC9wPg==
- 答案:RA==
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
本课配套习题挑战模式5/5
如图,用两根等长的钢条AC和BD交叉构成一个卡钳,可以用来测量工作内槽的宽度,设=m,且量得CD=b,则内槽的宽AB等于( )
A: |
B: |
C: |
D: |
- 提示1:PHA+5piT55+lQ0TiiKVBQu+8jOWPr+W+l+KWs0NPROKIveKWs0FPQu+8jOWug+S7rOeahOWvueW6lOi+ueaIkOavlOS+i+WNs+WPr+ino+etlDwvcD4=
- 答案:QQ==
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