问题
单项选择题
起重机变换工作半径是依靠变化起重臂的角度来实现的是( )塔吊。
A．上旋式
B．下旋式
C．动臂变幅
D．小车运行变幅
答案
参考答案：C
解析：起重机变换工作半径是依靠变化起重臂的角度来实现的是动臂变幅。
搜题请搜索小程序“爱下问搜题”
起重机变换工作半径是依靠变化起重臂的角度来实现的是( )塔吊。
A．上旋式
B．下旋式
C．动臂变幅
D．小车运行变幅
参考答案：C
解析：起重机变换工作半径是依靠变化起重臂的角度来实现的是动臂变幅。
| 短文改错。 | |
When my daughter Lee and his friends wanted to make planter boxes and sold them, I was glad they decided to earn money instead asking their parents for it, so I agreed to lend them hand. I gave them some carpentry (木工) lesson, and they all seemed capable (有能力) and carefully with my tools. Since they work behind the garage, a house is quieter than used to be. They are learning how to use money on a responsible (负责的) way, and I can tell that they feel quite be proud of themselves. | 1. ________ 2. ________ 3. ________ 4. ________ 5. ________ 6. ________ 7. ________ 8. ________ 9. ________ 10. ________ |