听觉发育已经完善的年龄是()
A.2岁
B.3岁
C.4岁
D.5岁
E.8岁
参考答案:C
With the nuclear crisis worsening in Iran, the world's attention is fixed again on________is called the
Middle East.[ ]
A. which
B. it
C. that
D. what
一般情况下,当电缆根数较少,且敷设距离较长时,宜采用()法。
A.直埋敷设
B.电缆沟敷设
C.电缆隧道敷设
D.电缆排管敷设