【多选题】1949年至1965年,我国建成了中国第一汽车制造厂,实现了中国汽车工业零的突破;接着建立了南京汽车制造厂和()形成了五个汽车生产基地。
【单选题】茎刺、叶刺、皮刺为同源器官,鳞茎、叶状茎、块茎为同功器官。( )
【单选题】魏晋南北朝时期,晋江流域得以开发的最主要原因是( )
【简答题】蓄能器是液压系统中的储能元件,它存储液体的 ,并在需要时释放出来供给系统。蓄能器常用有 和 两种。
【判断题】岩浆岩的主要造岩矿物有:钾长石、斜长石、石英、橄榄石、辉石、角闪石、黑云母和
【单选题】吐温60能增加尼泊金类防腐剂的溶解度,但不能增加其抑菌力,其原因是() A.两者之间形成复合物 B.吐温60能形成胶团增溶 C.前者不改变后者的活性 D.两者之间起化学作用
【单选题】A) They should make sure their children are always punctual for school. B) They should ensure their children grow up in a healthy environment. C) They should help their children accomplish high-qualit...
A.
They should make sure their children are always punctual for school.
B.
They should ensure their children grow up in a healthy environment.
C.
They should help their children accomplish high-quality work.
D.
They should see to it that their children have adequate sleep.