问题
单项选择题
发电机功率下降的原因有:()(1)机器调整(包括定时齿轮)不适当(2)燃油不足(3)空气不足(4)进气温度高。
A.(1)(2)(3)
B.(1)(3)(4)
C.(2)(3)(4)
D.(1)(2)(3)(4)
答案
参考答案:D
发电机功率下降的原因有:()(1)机器调整(包括定时齿轮)不适当(2)燃油不足(3)空气不足(4)进气温度高。
A.(1)(2)(3)
B.(1)(3)(4)
C.(2)(3)(4)
D.(1)(2)(3)(4)
参考答案:D
从方框中选择最佳选项完成对话。 | |
B: No, there aren't. There are six people in my family. __1__ A: Have you got grandparents? B: __2__ They are in Shanghai now. A: __3__ B: My parents are teachers. They are in my school. A: Have you got an aunt or an uncle? B: __4__ He's a doctor. A: __5__ B: No, I haven't. |