咽后壁组织瓣的长宽比例一般设计为()
A.1:1
B.2~3:1
C.1.5:1
D.1:1.5
E.3~4:1
参考答案:B
I don't want to be ____ in this problem, which will bring me a lot of troubles. [ ]
A. suffered
B. contained
C. introduced
D. involved
“不光铁会生锈,就连铜铝等金属也会生锈”一句是( )
A.并列复句
B.对立复句
C.递进复句
D.倚变复句