【判断题】柏拉图的教育思想集中体现在了他的代表作《教育漫画》中
【简答题】在实验中,小明实验的题目是“氧气的制取、收集和验满”。下图是他的主要实验步骤,其中操作有误的是 A B C D
【单选题】有一个左移位寄存器,当预先置入1011后,其串行固定接0,在4个移位脉冲CP作用下,四位数据的移位过程是( )
A.
1011—0110—1100—1000—0000
B.
1011—0101—0010—0001—0000
C.
1011—0110—0010—0001—0000
D.
1011—0001—0010—0001—0000
【简答题】Stroke is a very rare________ in people in their thirties. ( occurrence, to occur )
【单选题】调度绞车JD-2型与________是同一种型号。
【单选题】One of the differences between a two-stroke engine and a four-stroke engine is,()
A.
a two-stroke engine can’t work without cylinders
B.
a two-stroke engine can’t work without pistons
C.
a two-stroke engine can’t work without crankshafts
D.
a two-stroke engine can’t work without a blower
【单选题】One of the differences between a two-stroke engine and a four-stroke engine is,()
A.
a two-stroke engine works without exhaust operation
B.
a two-stroke engine works without compression stroke
C.
a two-stroke engine works without expansion stroke
D.
a two-stroke engine works without suction operation
【单选题】(2015·新课标全国II卷文综·33)由表1可以推知,19世纪70年代到20世纪初( ) 表1 英、美、法、德工业生产总和在世界工业生产中所占比例表 年代 1870 1896~1900 1913 比例 78% 74% 72%