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【单选题】
所有蛋白质都含有( )。A.
矿物质
B.
维生素
C.
氮素
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举一反三
【单选题】I saw them _____ basketball at this time yesterday.
A.
play
B.
played
C.
to play
D.
playing
【单选题】指出各句中加点的词古义与今义基本一致的一项( )
A.
备他盗出入与 非常 也
B.
而听 细说 ，欲诛有功之人
C.
于是 项伯复夜去
D.
沛公居 山东 时
E.
将军战 河北
【单选题】I saw a lot of children playing in the garden, most of them______girls.
A.
are
B.
were
C.
being
D.
have beern
【单选题】I saw some boys _______ soccer on the playground. [ ]
A.
are playing
B.
to play
C.
played
D.
playing
【单选题】When I passed the river, I saw some children ______ on the sand.
A.
play
B.
were playing
C.
playing
D.
played
【单选题】When I walked past the street and saw the children playing happily, their happy laughter _____ memories of my childhood. [ ]
A.
called in
B.
called for
C.
called on
D.
called up
【单选题】血管扩张药治疗心力衰竭的主要药理学依据是
A.
减少心肌耗氧
B.
降低心输出量
C.
降低心脏前、后负荷
D.
扩张冠状动脉，增加心肌供氧
E.
降低血压，反射性兴奋交感神经
【单选题】What can be learned from Paragraph 1?
A.
Business-class passengers are not charged with extra fees.
B.
Customers may not know how much to pay until they get aboard.
C.
Plane tickets are more expensive than they were a decade ago.
D.
Asian airlines charge fewer fees than their American counterparts.
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