特大型变压器是指容量（）的变压器。
A.大于8000KV²A
B.大于6300KV²A
C.大于63000KV²A
D.大于5000KV²A
参考答案：C
A doctor must be immediately sent for to __________ the seriously-injured boy.
A．cure
B．attend
C．accept
D．operate
酶法测定胆固醇通常采用的波长是()
A．540nm
B．500nm
C．405nm
D．450nm
E．630nm
