执 Ⅰ动词1.(拿着) hold 执鞭 hold a whip; 手执钢枪 hold a rifle in one's hands2.(执掌) take charge of; control; manage; wield 执炊 cook; prepare meals; 执狱 act as judge; 执教 be a teacher; teach3.(坚持) persist in; stick to; insist on 固执己见 persist in one's opinion; 各执一词。 each sticks to his own version [argument].; different people tell different stories.4.(执行) carry out; execute 执礼 observe the formalities5.[书面语] (捉住) catch; capture 捕执 arrest; catch; 战败被执 be captured after being defeated in battleⅡ名词1.(凭单) written acknowledgement; voucher 回执 receipt2.(姓氏) a surname 执诚 zhi cheng
The ultrastructure of the merozoites of eimeria tenellawas observed and discribed . the pellicle consist of two layer membranes , the outer membrane was a continous covering enclosing the whole merozoites , while the inner pellicular complex is interrupted at the anterior and the micropore , and thicken to form the polar ring and micropore . there are 24 microtubules under the pellicle of the merozoite which originated from the polar ring , all of them are connected with the polar ring , and extend alongside the inner pellicular complex to the middle of the merozoite . the head of the merozoite consists of a conoid , an apical vesicule and polar ring . the conoid is a hollow truncated cone . the conoid and spical vesicule can stretch and contract . there are three or more rhoptry and a lot of micronemes . the nucleus has nucleolus . and two layer membranes 利用透射电镜对柔嫩艾美耳球虫裂殖子的超微结构进行了观察描述.柔嫩艾美耳球虫裂殖子的表膜由外膜和内膜复合体两层组成,外膜连续,内膜复合体在头部断开形成极环,在其它部位断开形成微孔;裂殖子的膜下微管24根,起始于极环,向后延伸至细胞核处;裂殖子的头部由顶泡、锥体和极环组成,锥体和顶泡可以伸缩;柔嫩艾美耳球虫裂殖子棒状体3个以上,微线数量很多,二者都由电子致密的结构组成;细胞核位于裂殖子的中后部,外被双层膜,有电子致密的核仁和染色质