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【多选题】
若发现114号新元素R，下列有关R可能具有的性质不合理的是 [ ]A.
R是金属元素
B.
R的单质可作半导体
C.
R不存在稳定的气态氢化物
D.
R的最高价氧化物对应水化物为酸且酸性较强
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【简答题】3D 打印技术在传统文化保护上的应用有哪些? 用于文物修复的3D打印工艺有哪些?
【简答题】Paul couldn’t sleep last night. He woke up early and sat up, and then he lay down again. He felt terrible. “I must be sick,” he thought. “but I must study for that test.” He got up and looked for his ...
【单选题】He went to bed _______, when he woke up he found he still had his shoes on.
A.
drinking
B.
being drunk
C.
drunk
D.
having drunk
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