飞轮的外缘上常装有一个齿圈,其主要用途是()。
A、带动齿轮输出动力
B、盘车用
C、增加飞轮的质量
D、供启动发动机用
参考答案:D
完成句子。
1. 昨天因为交通拥堵,他们上学迟到了。
They were late for school _____ ______ the busy traffic yesterday.
2. 我父母昨天不同意我的意见。
My parents didn't me yesterday.
3. 父亲在睡觉。请你压低声音好吗?
Dad is sleeping. Could you please ______ your voise ______?
4. 他们把一半的钱给了慈善机构。
They have given the money to a charity.
5. 在最近的几年里,我的生活变化很大。
My life a lot in the last few years.
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