1956年毛 * * 提出在科学文化工作中实行“百花齐放，百家争鸣”的方针。以下属于贯彻这

.________ that he had wasted a lot of time, Tom decided to work hard on his study.

A． Realizing

B．To realize

C．Realized

D．Having been realized

用括号中所给单词的适当形式填空。

1. His illness is even ________ (bad) than I thought it would be.

2. Tree-planting Day is on the ________ (twelve) of March every year.

3. This kind of shampoo can make your hair ________ (shine).

4.Now the famous singer ________ (most)plays his own songs.

5. There are two ________ (well) in the small village. People there get water from them.

利用E花环沉降法可分离（）

A.单核细胞和B细胞

B.浆细胞和粒细胞

C.B细胞和T细胞

D.B细胞和粒细胞

E.B细胞和吞噬细胞

下列哪个不属于窄轨铁路常用的标准道岔（）。

A、普通单开道岔

B、转移道岔

C、对称道岔

D、渡线道岔

带风装料