什么是移表？

《杜甫传》的著者是（）。

A.郭志达

B.冯至

C.仇兆鳌

D.蔡梦

征用基本农田、耕地以外的土地超过（）公顷的，须报经国务院批准。

A.10

B.35

C.50

D.70

镰刀形红细胞贫血关键是基因发生突变，氨基酸由谷氨酸变成

A．缬氨酸
B．天冬氨酸
C．甘氨酸
D．脯氨酸
E．精氨酸

More than a year ago, the city announced that police would crack down on illegally parked cars and that resources would be diverted from writing speeding tickets to ticketing illegally parked cars. But no crackdown has taken place. The police chief claims that resources have had to be diverted from writing speeding tickets to combating the city’s staggering drug problem. Yet the police are still writing as many speeding tickets as ever. Therefore, the excuse about resources being tied up in fighting drug-related crime simply is not true.
The conclusion in the passage depends on the assumption that

A．every member of the police force is qualified to work on combating the city’s drug problem.

B．drug-related crime is not as serious a problem for the city as the police chief claims it is.

C．writing speeding tickets should be as important a priority for the city as combating drug-related crime.

D．the police could be cracking down on illegally parked cars and combating the drug problem without having to reduce writing speeding tickets.

E．(E) the police cannot continue writing as many speeding tickets as ever while diverting resources to combating drugrelated crime.

碎屑结构通常由那两种物质组成（碎屑物质和胶结物质）？