绒毛心

_____ to sunlight for too much time will do harm to one’s skin.

A．Exposed 　

B．having exposed

C．Being exposed

D．After being exposed

A．Multiple pipeling

B．Superpipeline

C．Superscalar

D．Very long instruction word

lPv6地址12AB:0000:0000:CD30:0000:0000:0000:0000/60可以表示成各种简写形式，下面的选项中，写法正确的是______。

A．12AB:0:0:CD30::/60
B．12AB:0:0:CD3/60
C．12AB::CD30/60
D．12AB::CD3/60

更换运行中电流互感器应注意哪些问题？

焦油加工的主要任务是获得酚、萘、蒽等纯产品和（）等粗产品。