Measles ______ a kind of infectious illness. A: is B: are C: were D: have beenA、 isB、 areC、 wereD、 have been
Measles ______ a kind of infectious illness. A: is B: are C: were D: have beenA、 isB、 areC、 wereD、 have been
They ______(have, has) lunch at 12:00.
They ______(have, has) lunch at 12:00.
He has been traveling for 12 years.
He has been traveling for 12 years.
3.节点法一般方程中Isa的含义是；Isb的含义是。
3.节点法一般方程中Isa的含义是；Isb的含义是。
Can you believe that he has ________ go-karting since he was 12 years old？
Can you believe that he has ________ go-karting since he was 12 years old？
霍尔电压UH与ISB的乘积成正比，与样品的厚度d成正比
霍尔电压UH与ISB的乘积成正比，与样品的厚度d成正比
因特网服务提供商的英文缩写是（） A: USB B: ISP C: ISB D: IDP
因特网服务提供商的英文缩写是（） A: USB B: ISP C: ISB D: IDP
巴基斯坦首都的城市三字代码为（） A: KHI B: MNL C: ISB D: IST
巴基斯坦首都的城市三字代码为（） A: KHI B: MNL C: ISB D: IST
Linda usually has lunch at_____. A: 12 B: 1 p.m. C: 2 p.m.
Linda usually has lunch at_____. A: 12 B: 1 p.m. C: 2 p.m.
According to Yi solar calendar, a year is divided into ___ months. Each month has ____days. A: 10; 30 B: 12; 30 C: 12; 36 D: 10; 36
According to Yi solar calendar, a year is divided into ___ months. Each month has ____days. A: 10; 30 B: 12; 30 C: 12; 36 D: 10; 36