问题
单项选择题
2GF158M-4电除尘器的长高比为（）。
A、3：1
B、1：3
C、1：2
D、2：1
答案
参考答案：B
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2GF158M-4电除尘器的长高比为（）。
A、3：1
B、1：3
C、1：2
D、2：1
参考答案：B
| Choose the best response from A to F according to the sentences given. Each choice should be used only once. | |
| ( )1. Bob, it's raining. Close the window, please! ( )2. My teacher has gone to Beijing, hasn't she? ( )3. Wow! What a nice dress you are wearing! ( )4. I will have a birthday party tonight. ( )5. Peter, how are you getting on with your new classmates?
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