当煤中碳酸盐二氧化碳小于()时,可不考虑对干燥无灰基挥发分的影响。
A、12%
B、6%
C、2%
参考答案:C
补全对话:根据对话内容,从方框中选择适当的选项补伞对话,其中有两项为多余选项。
W: Good morning, English Department Office. 小题1:
M: Good morning. May I speak to Professor Smith, please?
W: 小题2:
M: Alright.
W: I'm sorry he is at an important meeting right now.
M: Oh, I see. 小题3:
W: Yes, surely.
M: 小题4: My name is Jack.
W: Could I have your telephone number, please?
M: My home telephone number is 9796453.
W: 9796453.
M: My cell phone number is 13010984563.
W: 13010984563. 小题5:
M: Thank you very much.
W: Not at all.
下列图中,表示的是近视眼形成原因的是 [ ]
A.
B.
C.
D.