下载APP
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】儿童多动症是小学生中常见的一种以注意缺陷、活动过度和好冲动为主要特征的综合性障碍，其高峰发病年龄在 【 】
A.
3岁～5岁
B.
5岁～7岁
C.
8岁～10岁
D.
12岁～13岁
【单选题】以下哪个不是文化的一般特征（）。
A.
文化是由人类进化过程中衍生出来或创造出来的。
B.
文化是后天习得的。
C.
文化是一个连续不断的过程。
D.
只有经过人类有意无意加工制作出来的东西才是文化。
【多选题】党参的性状特征为
A.
圆柱形，根头部有“狮子盘头”
B.
表面黄棕色至灰棕色，根头下有致密的横纹，眉状疤痕或黑褐色胶状物
C.
质稍硬或略带韧性
D.
断面皮部淡黄白色至淡棕色，木部淡黄色
E.
气微，味苦
【单选题】Directions: There are 4 passages in this part. Each of the passages is followed by 5 questions or unfinished statements. For each of them there are 4 choices marked A, B, C and D.Passage One ...
A.
they are very kind-hearted and care much about the people there
B.
they are afraid that more people will immigrate into their countries
C.
they know that governments there are not taking effective measures to deal with the problem
D.
they fear that the pollution there may cause harm to their own countries