问题
单项选择题
标准煤是低位发热量为（）的煤。
A.7000大卡/公斤
B.8000大卡/公斤
C.9000大卡/公斤
答案
参考答案：A
搜题请搜索小程序“爱下问搜题”
标准煤是低位发热量为（）的煤。
A.7000大卡/公斤
B.8000大卡/公斤
C.9000大卡/公斤
参考答案：A
| 选词填空。 | |
2. My hand hurts, a _______________ can help me. 3. Lily likes dancing , she is a _______________. 4. My dog is not well, a _______________ can help it . 5. David's uncle works in a farm, he's a _______________. |