胶乳凝集试验所用载体为聚苯乙烯胶乳，其直径约为 （） A.0.3μm B.0.8μ

阅读下面短文, 掌握其大意，然后从各题所给的A、B、C、D四个选项中，选出最佳选项。
Paul got    the bus to go to the town. It was very crowded and he had to stand for about five    . Then some of the people got    . Paul sat down next      a fat woman. She     several shopping bags and Paul didn’t have much place     the seat. He was uncomfortable.    last the bus got to the town. All the people started to get off. Paul was very polite, so he stood    to let the fat woman get off before him.  She said,”   .” Then she tried to get     the seat with all her bags. But she couldn’t move. She was too fat and her bags were too heavy.

小题1:	A．off B．on C．down D．up

小题2:	A．minutes B．days C．weeks D．years

小题3:	A．off B．up C．on D．down

小题4:	A．in B．at C．near D．to

小题5:	A．carries B．buys C．had D．has

小题6:	A．in B．at C．on D．upon

小题7:	A．In B．At C．On D．Up

小题8:	A．down B．under C．up D．at

小题9:	A．Go away B．Go at once C．Look out D．Thank you

小题10:

A．down to B．off C．on D．out of