从法律界定来看，投资者信用证券账户记录的是实际证券，客户信用交易担保证券账户记录的是明细数据，而非实际证券。( )
参考答案：错
— Would you like to play tennis with me ______ it doesn't rain tomorrow?
— Sure, ______ I am busy. [ ]
A. if; since
B. whether; but
C. if; unless
D. because; until
骨骼肌疾病时可见血清LD同工酶的变化为（）。
A.LD1>LD2
B.LD2>LD3
C.LD3>LD4
D.LD4>LD5
E.LD5>LD4
