Oil prices have risen by32 percent since the start of the year,_____a record US $57.65 a barrel on April 4.

A．have reached

B．reaching

C．to reach

D．to be reaching

关于粘多糖病的分型依据是

A．酶缺陷
B．临床表现
C．基因型
D．基因型+临床表现
E．酶缺陷+临床表现