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【简答题】
年,法国人 发明了摄影术,这一天被世界公认为摄影术的诞生日。
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举一反三
【单选题】He has the habit of getting up early and is always the first ____ to the classroom.
A.
coming
B.
to come
C.
comes
D.
came
【单选题】Henry is a beggar. He has the habit of picking up cigarette ends left by other people. He can always make one new cigarette out of seven ends. One Saturday night he collected 49 cigarette ends. The ne...
A.
Ten.
B.
Seven.
C.
Nine.
D.
Eight.
【简答题】平面机构中,两构件通过 接触构成的运动副称为低副,通过 或 接触构成的运动副称为高副。
【简答题】He has the habit of notes _____ _______ ______ while reading. 他读书时有在页边空白处作注释的习惯。
【简答题】 日本皇室家徽是 __________ ,一般百姓忌用此种图案。
【单选题】He has the habit of ________ useful information while reading.
A.
getting down
B.
setting down
C.
going down
D.
bringing down
【简答题】平面机构中,两构件通过面接触而构成的运动副称为 , 通过点、线接触而构成的运动副称为 。
【单选题】He has the habit of ___ notes when ____ a meeting.
A.
writing; to have
B.
putting; having
C.
doing; to have
D.
taking; having
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