我国公安机关是人民的公安机关。 ( )
参考答案:对
结构简单,有口无肛门,这类动物叫做(),代表动物有海葵、海蜇、珊瑚虫。
64. The price of the portable computers(手提电脑) is still so that I can’t afford to buy one.
A.high
B.low
C.expensive
D.Dear