抗铜绿假单胞菌作用最强的头孢菌素是A．头孢西丁 B．头孢他定 C．头孢孟多 D．头孢

一只口袋内装有大小相同的5只球，其中3只白球，2只黑球，从中一次摸出两

只球，则摸出的两只球颜色不同的概率是       .

( )多数情况下由各省、自治区、直辖市从当地社会治安情况出发，主动地和有节奏、有准备、有重点地开展。

A．社会治安综合治理

B．社会治安防控体系

C．社区警务

D．集中打击或专项斗争

We do not know exactly how many whales there are in the sea because we can’t count them. But we believe at the beginning of the eighteenth century there were 105,000 humpback whales and 120,000 right whales. At the beginning of the twentieth century there were 75,000 humpbacks and 80,000 rights.

Since 1900 their numbers have fallen very quickly. Between 1935 and 1950 the number of humpbacks fell from 20,000 to 10,000 and since 1950 the number has fallen to only 6,000. The number of right whales has fallen even faster. In 1935 there were 25,000. The number fell to 6,000 in 1950 and since 1950 the number has fallen to 4,000. Men have always been hunters. Thousands of whales have become victims(牺牲品). It’s time to do something to protect whales.

小题1:Which of the following is true?

A．We know the exact number of whales in the sea.

B．It’s easy for us to count whales in the sea.

C．We find it impossible to count whales in the sea.

D．We don’t want to know how many whales there are in the sea.小题2:The number of right whales has fallen _______.

A．more slowly than that of humpback whales

B．faster than that of humpback whales

C．as slowly as that of humpback whales

D．as fast as that of humpback whales小题3:The passage is mainly about _______.

A．the number of humpback whales

B．the number of right whales

C．hunting whales

D．the necessity of protecting whales

在国际税收中，国际反避税合作的主要内容是（）。

A.税收转让定价

B.国际税收协定

C.国际税收抵免制度

D.税收情报交换

测试ZN28-12型真空断路器特性参数时需要的量具为0～200mm的游标卡尺及0～1000cm的金属直尺各一把。( )