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【判断题】
布玩具是用纺织品一类的面料剪成一定的形,再充填花絮、锯木屑等填充物,使之立体,再经缝合、装饰的玩具。A.
正确
B.
错误
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反馈参考答案：
举一反三
【多选题】已知2,4-二硝基酚为典型的解偶联剂,如向含有离体完整线粒体的氧化磷酸化体系中加入该物质,可观察到以下哪种现象
A.
O2耗量不变
B.
O2耗量↓
C.
ATP生成↑
D.
ATP生成↓
E.
ATP生成不变
【简答题】(1)化合物G 的相对分子质量为140，G 中含硅元素，其质量分数为60%，另有元素Y。 G 可以由化合物E(含两种元素)与NH 3 反应而生成，同时产生HCl 气体。 请推断：G 和E的化学式分别为______________、______________。 (2)粉末状G 能够与氧气反应，所得产物中有一种是空气中的主要成分，另一种是工业上生产玻璃的主要原料。请写出化合物G 与氧气反应的化学方程...
【单选题】— Do you know ______ he has done with the money? — He has bought a new house in a garden district. [ ]
A.
how
B.
when
C.
what
D.
where
【单选题】在标准ASCII码表中，已知英文字母I的ASCII码是01001001，英文字母F的ASCII码是
A.
01000110
B.
01110001
C.
01010100
D.
01011111
【单选题】听力原文：M: Bill won't graduate until this summer, but did you know that he has already started his own computer company last semester? W: Wow, he's really put what he has learned into practice. Q: What d...
A.
He needs to take some remedial courses.
B.
He didn't do very well in school.
C.
He is able to apply his knowledge.
D.
He won't be able to graduate this semester.
【单选题】－－Has he finished his essay? －－I dont know. He __________ it this morning.A.has written##
A.
--Has he finished his essay? --I dont know. He __________ it this morning. A.has written
B.
was writing
C.
wrote
D.
had written
【单选题】---Do you know how long ________? ----I’m sorry I don’t know.
A.
he has come here
B.
has he been married
C.
Tom has bought the car
D.
his uncle has been abroad
【单选题】I don’t know whether he has finished the novel, but he ________ it this morning.
A.
was reading
B.
has read
C.
read
D.
had read
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