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【单选题】
化学科学需要借助化学专用语言来描述。下列有关化学用语表示正确的是A.
丙烷的球棍模型：
B.
的名称：2－乙基丙烷
C.
乙酸的分子式：CH 3 COOH
D.
氧化钠的化学式：Na 2 O 2
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】How long is Dee's dress when she exits the car?
A.
It is a mini skirt.
B.
It touches the ground.
C.
It reaches her knees.
D.
It touches her calves.
【单选题】What was Dee’s feeling while reading the letters?
A.
sad
B.
happy
C.
indifferent
D.
emotionally-touched
【简答题】“DEE”结构(“华尔街日报体”)
【单选题】Buster is Dee's new puppy. He is also Dee's new problem. Buster is very loving, but he isn't good at learning. When Dee calls the puppy, Buster comes bounding over the gate and through Dad's garden. D...
A.
walking
B.
leaping
C.
crawling
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