A:单薄(báo) 回溯(sù) 粗糙(cāo)粘贴(niān)
B:逡巡(qūn) 呓语(yì) 拙劣(zhuō)感慨(kài)
C:骁勇善战(xiāo) 徇私舞弊(xùn) 桀骜不驯(jié)
D:酣畅淋漓(hān) 卓而不群(zhuó) 翘首以望(qiào)
有一种未知浓度的稀硫酸600g,向其中加入足量的锌粉,充分反应后过滤,反应中共收集到氢气1.2g,求:
It's 11: 00 pm now, but the light in Peter's room is still on. He must have forgotten _______ before going to bed.