A:travel
B:to travel
C:traveled
D:travel
小明根据实验数据绘制了电阻R2随电阻R1变化的图像,如图所示。请你根据该图像和已有知识判断:当电阻R1=52Ω时,电阻R2=____ Ω。
The skin, an ________ part of your body and its largest organ, ________ as a barrier against diseases.
下列属于第一顺序继承人的是( )
①子女 ②父母 ③兄弟姐妹 ④配偶
—Nancy, remember _______ the window before you go to bed!
—OK, Mom!