2-3岁幼儿的心率( )
A.70~90次/分B.80~100次/分C.100~120次/分D.110~130次/分E.120~140次/分
参考答案:C
词形转换,用括号内所给单词的适当形式填空,毎空格限填一词。
1.Li Ma is an outstanding tennis ___________ (play).
2.Be __________ (care) when you cross the street.
3.October is the ___________ (ten) month of the year.
4.Recently, scientists have found that dogs are ___________ (smart) than cats.
5.Such an important problem should be discussed __________ (serious).
6.Anna had a fever yesterday, so she was __________ (able) to go to school.
将一盏电灯放在桌子上代表太阳,在电灯旁放置一个地球仪代表地球,拨动地球仪模拟地球运动。读图回答问题。
图中P地()
A.位于晨线上
B.位于昏线上
C.当地时间6时日出
D.当地时间8时日出