问答题

Who will not support those different slimming diets according to the passage?
A．The public figures like the film stars, television stars and sports stars.
B．The doctors such as Jan Kwasniewski and Robert C. Atkins.
C．The nutrition experts such as Bettye Travis and Lyndel Costain.
D．The writers like the diet writer Michel Montignac.

A.The
B.
B．The
C.
C．The
D.
D．The
E.

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Snowy River is designated as a national conservation area because
A．that can prevent it from any human activity which affects the water flows.
B．the water flows need protecting and the research needs funding.
C．the microbes uncovered in the cave deserve our protection.
D．the scientific research on the River ought to be funded.

A.that
B.
B．the
C.
C．the
D.
D．the
E.

单项选择题

关于Hl受体拮抗剂构效关系的叙述，正确的是( )。
A. 光学异构体均显示相同的抗组胺活性
B. 结构中两个芳环处于一个平面时具有最大的抗组胺活性
C. 芳环与叔氮原子距离为0.5～0.6 nm
D. 几何异构体均显示相同的抗组胺活性