The sentence "Children are a relatively modern invention" underlined in Paragraph 1 means
A. were exactly the same as adults a few hundred years ago
B. did not exist at that time because there were no families yet
C. were not different from adults in physical appearance
D. were not different from adults
查看答案
听力原文：女：晓伟，吃饭了吗？
男：你还别说，现在还真觉得肚子“咕咕”叫了。
问：从对话中可以知道晓伟怎么了？
(25)
A. 已经不想吃了
B. 不舒服不想吃
C. 还没有吃饭呢
D. 已经吃过饭了
【C2】
A. causes
B. says
C. dictates
D. marks
According to Hayley Hung, the scientists need to figure out______.
A. the harm the Pops will do to human beings
B. why the Pops have been trapped in the ice
C. the scale of the Pops stored in the Arctic
D. how to eliminate the banned toxic chemicals
吸烟等于“慢性自杀”是因为：
A. 吸烟危害青少年健康
B. 吸烟者损害他人健康
C. 吸烟潜在的危险很大
D. 吸烟者易患多种疾病
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