SUPPLEMENTARY INSTRUCTIONS1. Calculations and workings need only be made to the nearest RMB.2. All apportionments should be made to the nearest month.3. All workings should be shown.TAX RATES AND ALLOWANCESThe following tax rates and allowances are to be used in answering the questions.

ALL FIVE questions are compulsory and MUST be attempted

核酸分子杂交技术建立所依据的原理是（）。

A.核酸碱基之间氢键结合力

B.核酸碱基之间二硫键结合力

C.核酸碱基之间静电引力

D.核酸双链之间氢键结合力

E.互补序列单链核苷酸相遇时退火形成双链