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【简答题】
1864年，英国青年物理学家______ 在研究了当时发现的电磁现象的基础上，建立了电磁场理论，并预言了电磁波的存在．1888年德国青年物理学家______第一次通过实验证实了电磁波的存在．
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皮皮学刷刷变学霸
举一反三
【单选题】We don't allow ______ in the meeting room.
A.
to smoke
B.
smoked
C.
smoking
D.
to smoking
【单选题】we don't allow in the office. That is to say, we don't allow people in the office.
A.
smokeing; to smoke
B.
to smoke; smoking
C.
smoking; smoking
D.
to smoke; to smoke
【单选题】We don't allow _____ in this room. [ ]
A.
smoking
B.
to smoke
C.
people smoking
D.
people to smoking
【单选题】-We don't allow anyone ________ here. -Well, I hate to say it again. We don't allow ________ here.
A.
smoking; smoking
B.
to smoke; to smoke
C.
smoking; to smoke
D.
to smoke; smoking
【简答题】在Word编辑状态下，可以通过键盘上的BackSpace键将已选中的文本块删除。
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