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【单选题】
下列( )引起转塔刀架没有抬起动作故障现象的原因。A.
压力不够
B.
抬起速度或抬起延时时间短
C.
两计数开关不同时计数
D.
液压夹紧力不足
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【单选题】As a result of the earthquake, two-thirds of the buildings in the area _____. [ ]
A.
need repairing
B.
needs repairing
C.
needs to be repaired
D.
need to repair
【简答题】细胞生命活动的控制中心是 ，细胞通过 与外界进行物质交换，由 ，分解有机并释放能量，供细胞生命活动利用，生物所需的营养物质和能量都来自植物的 通过光合作用制造的有机物。
【单选题】They _____ two tall buildings in the small town in the last two years. [ ]
A.
built
B.
had built
C.
have built
D.
will build
【单选题】What can we learn from the WTC collapse?
A.
Although the structure of the two buildings was very strong, the death toll was still very shocking.
B.
The structure of the two buildings was of the first class.
C.
The structure of the two buildings was not so strong as people had expected.
D.
The structure of the two buildings was strong enough to withstand any accidents.
【单选题】草履虫生命活动所需能量来自 [ ]
A.
自身从太阳光能中获取的能量
B.
水中的温度透入细胞的能量
C.
从食物泡中直接得到的能量
D.
细胞内氧化分解有机物释放的能量
【单选题】__________was reported yesterday, two buildings were caught on fire in the town.
A.
It
B.
As
C.
What
D.
That
【单选题】In several nineteenth-century paintings the marble buildings of the Acropolis in Athens are portrayed as being reddish, but the buildings do not now appear reddish. The marbles natural color cannot ha...
A.
The Acropolis can be clearly seen from virtually any location within the city of Athens.
B.
Tiny plants called lichens living on marble can cause the marble to appear reddish.
C.
Many nineteenth-century artists strove for true-to-life accuracy in every detail of their paintings.
D.
Some types of marble are naturally reddish, whereas other types are greenish or white.
E.
Not all nineteenth-century paintings of the Acropolis show the marble buildings as being reddish.
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