问题
单项选择题
下面哪种操作会导致采煤机整机断电（）。
A、按下红外键盘急停按钮
B、按下遥控器急停按钮
C、按下截割停止按钮
D、按下急停按钮（蘑菇按钮）和采煤机停按钮、拉动拉线开关
答案
参考答案：D
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下面哪种操作会导致采煤机整机断电（）。
A、按下红外键盘急停按钮
B、按下遥控器急停按钮
C、按下截割停止按钮
D、按下急停按钮（蘑菇按钮）和采煤机停按钮、拉动拉线开关
参考答案：D
| 阅读理解。 | |
run very fast and I can swim, too. I don't like fish and carrots, bones (骨头) is my favorite food. I help people to keep the house (看家). What am I? Yes, I'm a dog. 根据短文内容，判断句子对(√)错(×)。 ( ) 1. A dog has four legs. ( ) 2. A dog can run and swim. ( ) 3. A dog doesn't like bones. ( ) 4. A dog helps people to keep the house. ( ) 5. A dog is our friend. 根据短文内容，选出正确选项。 | |
| 6. A dog has ______________. | |
[ ] | |
| A. four legs B. one eye C. two hands | |
| 7. A dog can ______________. | |
[ ] | |
| A. read B. swim C. speak | |
| 8. A dog likes ______________. | |
[ ] | |
| A. fish B. bones C. carrots |