-1, 2,-3, 4,-9, 8, ( )
A.11
B.-11
C.27
D.-27
参考答案:D
解析:隔项规律,奇数项为-3(上标)0,-31,-32,-33。
考考你的记忆力,根据句意及首字母补全在本课中出现的单词。
1.We are d_____ from them.
2."R_____"means "again".
3.Can you s_____ the song in English?
4.I hope you r_____ to tell him about it.
5.Do you have a s_____ friend?
6.I'm good at ping-pong. That makes me u_____.
7.Can you write a letter to me to d_____ yourself?
8.Let me i_____ my friend to you.
9.Do you know how they c_____ the festival?
10.We should be c_____ in ourselves.
麻醉恢复期血气分析异常的常见原因有()。
A.麻醉药物的残余作用
B.呼吸道分泌物增多,阻塞气道
C.术中过度通气
D.躁动
E.酸碱平衡失常