某工厂进行接触粉尘与尘肺关系的队列研究得知，该工厂工人尘肺年死亡率为0．48‰，接触

For a trade embargo against a particular country to succeed, a high degree of both international accord and ability to prevent goods from entering or leaving that country must be sustained. A total blockade of Petrie’s ports is necessary to an embargo, but such an action would be likely to cause international discord over the embargo.
The claims above, if true, most ply support which of the following conclusions

A．The balance of opinion is likely to favor Petrie in the event of a blockade.

B．As long as international opinion is unanimously against Petrie, a trade embargo is likely to succeed.

C．A naval blockade of Patria’s ports would ensure that no goods enter or leave Patria.

D．Any trade embargo against Petrie would be likely to fail at some time.

E．(E) For a blockade of Patria’s ports to be successful, international opinion must be unanimous.

多层住宅中，单栋住宅的长度大于（）m时应设4m宽、4m高的消防车通道，大于（）m时应在建筑物底层设人行通道。

A.160；60

B.150；80

C.150；60

D.160；80

鱼体______为腐败变质。

A．鳃由鲜红色变成暗褐色

B．腹部膨胀

C．肛门突

D．鱼骨分离

对于脑梗死，最早能显示缺血病灶的检查是（）

A.CT

B.TCD

C.MRA

D.MRI

E.血管彩超

食用牡蛎后引起荨麻疹、湿疹的可能原因是（）。

A.体内缺乏葡萄糖6-磷酸酶

B.红细胞中缺少单加氧酶

C.体内缺乏半乳糖激酶

D.食物中含有酪胺

E.食物中含有组胺释放因子