实验室里量取8mL水并进行加热,下列需用的化学仪器组合正确的是 ( )①带铁夹的铁架台 ②10mL量筒 ③100mL量筒 ④酒精灯 ⑤石棉网 ⑥试管 ⑦试管夹 ⑧胶头滴管
A:②④⑥⑦
B:①③④⑥⑧
C:①②④⑤⑧
D:①②④⑤⑥
—Don't give up, my children. Keep ________ and you will be successful.
—Thank you, Mr. Wang. We'll try our best.
读《简·爱》,年幼的简·爱有一次被舅妈关入红房子是为什么?
x +y =(x+y) -____=(x-y) +____.