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【多选题】
参与移植排斥的靶抗原有( )A.
HLA 分子
B.
ABO 血型抗原
C.
Rh 血型抗原
D.
次要组织相容性抗原
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举一反三
【单选题】They are sweating all over. They ______ in the field.
A.
may be
B.
must have been working
C.
could be
D.
must having been working
【单选题】—Could you tell me the way to the Summer Palace? —______.
A.
All right
B.
Certainly
C.
Yes,l could
【多选题】C51 中要对单片机片外 RAM 空间某端口读写访问时,可以通过以下几种方式实现()
A.
使用专用访问指令
B.
使用 XBYTE 宏定义
C.
定义指向外部空间的指针
D.
使用 _at_ 关键字
【多选题】C51中要对单片机片外RAM空间某端口读写访问时，可以通过以下几种方式实现()
A.
使用 XBYTE 宏定义
B.
定义指向外部空间的指针
C.
使用专用访问指令
D.
使用 _at_ 关键字
【简答题】偶数羽状复叶
【单选题】听力原文： Russia and France are calling on Iran to stop all uranium enrichment. The two countries issued their statement during a visit to Moscow by French Foreign Minister Dominique de Villepin. Iran res...
A.
Production of fuel for nuclear reactors.
B.
Small-scale uranium enrichment.
C.
Completion of nuclear weapons.
D.
Maintenance of atomic weapons.
【单选题】People all over the world know Wimbledon as the centre of lawn tennis. In 1874 it was a country village, but it was the home of the All England Croquet Club. The Club had been there since 1864. A lot ...
A.
a country village
B.
the home of an unusual croquet club
C.
the centre of lawn tennis
D.
a famous place of interest near London
【多选题】单叶对生的枝条与偶数羽状复叶的总叶柄区别为 。
A.
单叶对生枝条顶端具有顶芽
B.
偶数羽状复叶总叶柄顶端为叶
C.
单叶对生的小叶叶腋处具腋芽
D.
偶数羽状复叶的小叶叶腋处具有腋芽
【单选题】When one is having a cold, he may often have all the following symptoms EXCEPT______.
A.
coughing
B.
having a sore throat
C.
having a runny nose
D.
having a stomachache
【简答题】The streets are all dry . It ____ during the night . A．can''t have rained B．mustn''t have rained C．couldn''t rain D．shouldn''t have rained
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