【单选题】《电力安全工作规程(热力和机械部分)》规定:使用砂轮研磨时应戴防护眼镜或装设玻璃,用砂轮工具时应使火星向下,()用砂轮的侧面研磨
【单选题】使用砂轮研磨时,应戴()或装设防护玻璃。
【单选题】What are the two speakers mainly discussing?
A.
They are planning where to celebrate the anniversary.
B.
They are arguing which restaurant is best.
C.
They are talking about the best style. of dinner.
D.
They are longing to do something different.
【判断题】在任何状态的电路中,没有电压就没有电流,有电压就一定有电流。
【单选题】使用砂轮研磨时,应戴()或装设防护玻璃。
【判断题】使用砂轮机研磨时,应戴防护眼镜或装设防护玻璃。
【判断题】使用砂轮研磨时,应戴防护眼镜或装设防护玻璃。()
【单选题】Questions 14 ~ 17are based on the following dialogue. What are the two speakers talking about?
A.
How to arrange for a trip.
B.
How to book a satisfactory room.
C.
When the shop will be closed.
D.
What the weather is like.