题目

After the long journey, the three of them went back home, ______. A . hungry and tiredly B . hungry and tired C . hungrily and tiredly D . hungrily and tired 答案:B下列四幅图的有关说法中,正确的是        A.分子间距离为r0时,分子间不存在引力和斥力B.估测单层的油酸分子直径大小d时,可把它简化为球形处理C.食盐晶体中的钠、氯离子按一定规律分布,具有空间上的周期性D.猛推木质推杆,密闭的气体温度升高,压强变大,气体对外界做正功
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