若在潮湿环境或水中使用的砂浆,则可以选用石灰、石膏作为胶凝材料。
参考答案:错
How did they get there
A.They started to look for the subway station.
B.They Would rather drive than go by subway.
C.They went by subway because the car wasn’t working.
D.They drove so they wouldn’t have to go by subway.
关于婴儿注意发生发展的描述,错误的是()。
A.婴儿一生下来就有注意
B.新生儿已有了注意的选择性,具备了对外界进行扫视的能力
C.1~2个月婴儿的注意已明显偏向曲线、不规则图形
D.6个月婴儿注意表现在更广泛、更复杂的吸吮、抓握、操作等日常感知活动
E.1岁以后的婴儿听到成人说出某个物体的名称时,便会相应地注意那个物体