根据楼板传力途径,一般混凝土预制板属于()板。(双向、单向)
参考答案:单向
连词成句,注意大小写及标点符号。
1. an excellent goalkeeper is he (.)
2. people some winter in the sick feel (.)
3. clean room help their you them did (?)
4. them when did see you (?)
5. I park bike by went to a (.)
与细菌抗吞噬作用有关的细菌结构是( )
A.荚膜 B.芽胞C.菌毛 D.鞭毛