How many abdominal injuries in children were caused by bicycle accidents？
A. Thirty.
B. Ninety.
C. 50 percent.
D. More than athird.
查看答案
It is suggested that modern societies differ from traditional societies in that
A. the parents-child relationship is more exclusive in modern societies.
B. a child more often grows up with his/her brothers or sisters in traditional societies.
C. mother brings up children with the help of her husband in traditional societies.
D. children in modern societies are more likely to develop mental illness in later years.
A．overB．onceC．againD．away
A. over
B. once
C. again
D. away
Muscular relaxation, a temperature drop, and breath regularity are characteristics of
A. REM sleep
B. Stage 1 sleep
C. delta rhythms
D. Stage 2 and 3 sleep
A．relatedB．popularC．loyalD．concerned
A. related
B. popular
C. loyal
D. concerned
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