其结构的背面有食管纵肌部分附着于此的是()。
A.甲状软骨
B.环状软骨
C.杓状软骨
D.会厌软骨
E.小角软骨
参考答案:B
It's helpful to put children in a situation ________ they can see themselves differently.[ ]
A. that
B. when
C. which
D. where
在小电流接地系统中,发生金属性接地时接地相的电压()。
A、等于零;
B、等于10kV;
C、升高;
D、不变。