（）期，自觉行动目的发展的显著特点是自觉的行动目的逐渐形成。
参考答案：幼儿中
供小于求时，就会使价格上升，价格上升就会使利润减少，从而影响重新吸引投资。（）
The emergency signal for fires is sounded on the ship’s whistle and general alarm as（）.
A.a continuous ringing for 10 seconds
B.one short ring followed by one long ring
C.two long rings of at least 20 seconds
D.a continuous ringing until the fire is extinguished
