【多选题】电气主要危害是:()
A.
对人体的伤害作用,包括触电事故、电弧引起的电伤、静电伤害;
B.
对物体的损害,主要是设备、以及房屋烧毁,引起电气装置失灵等,严重时可引起电气火灾爆炸事故;
C.
对环境的干扰和污染,主要是指电磁污染、雷电等;
D.
引起二次事故,如:高处作业触电导致坠落,引起火灾爆炸等
【单选题】A: May I take a ? B: OK, thanks.Tell him to come to school to play football tomorrow afternoon.
【单选题】--May I take your order now? --OK, I'll come back in a few minutes.
A.
Could you bring us the bill?
C.
Yes, here it is. Thank you.
D.
No, we need more time.
【简答题】材料一:16世纪时,商人们把亚洲的茶叶、丝绸、瓷器、香料,非洲的黄金和象牙,美洲的黄金、白银、玉米、烟草和欧洲的枪支、工艺品等运往世界各地。
材料二:两次工业革命的部分成果 材料三:马克思、恩格斯在《宣言》中说:“美洲的发现、绕过非洲的航行,给新兴的资产阶级开辟了新天地。东印度和中国的市场、美洲的殖民化、对殖民地的贸易、交换手段和一般商品的增加,使商业、航海业和工业空前高涨,因而使正在崩溃...
【简答题】May I
take a ___? OK, thanks. Tell him to come to school to play football tomorrow
afternoon.A. message B. notes C. words D. sayings
【单选题】A:May I take a ________? B:Ok, thanks. Tell him to come to school to play football tomorrow afternoon.
【单选题】A:May I take a_________? B: OK, thanks.Tell him to come to school to play football tomorrow.
【简答题】新产品开发的“三化”是指( )、( )、( )。