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【单选题】
在以下4属微生物中,可引起非豆科植物根瘤的共生固氮菌是:A.
固氮菌属
B.
固氮螺菌属
C.
根瘤菌属
D.
弗兰克氏菌属
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【单选题】Why not take_______ umbrella with the sign 'Made in china'? It is_______ useful one.
A.
an; an
B.
an; a
C.
a; an
D.
a: a
【单选题】Why does Wal-Mart think it reasonable to open its store there?
A.
Customers there broadly accept it.
B.
Other buildings have ruined the scenery of the ancient site.
C.
The local shops are small and expensive.
D.
Wal-Mart does no harm to the nearby sceneries.
【单选题】Why does Wal-Mart think it reasonable to open its store there?
A.
Customers there broadly accept it.
B.
Other buildings have mined the scenery of the ancient site.
C.
The local shops are small and expensive.
D.
Wal-Mart does no harm to the nearby sceneries.
【单选题】下面是人体血液循环途径的某一部分，途中X、Y分别代表（ ） 上腔静脉→X→右心室→Y→肺部毛细血管．
A.
左心房、肺动脉
B.
左心房、肺静脉
C.
右心房、肺动脉
D.
右心房、肺静脉
【简答题】Reading Comprehension There is one passage in this section. The passage is followed by 5 questions. For each of them there are four choices marked A), B), C) and D). You should decide on the best choi...
【单选题】下面是人体血液循环途径示意图的某一部分，图中X、Y分别代表 （ ） →上腔静脉→X→右心室→Y→肺部毛细血管
A.
左心房、肺动脉
B.
左心房、肺静脉
C.
右心房、肺动脉
D.
右心房、肺静脉
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