One of the guidelines in writing the C code for a software tool is as follows: write code that is as clear and as simple a (76) . The C language can be difficult to read if you combine all (77) features in a single statement. Break complicated (78) into several easy to understand statements for the (79) of readability. This style helps to make your programs more (80) and error-free.

79（）

A.readable

B.reusable

C.possible

D.semantic

E.syntactic

F.constructions

G.safe

H.impossible

I.sake

J.structure

如图是甲乙两电阻的电流与电压关系的图象，现将甲乙串联后接在电压为4.5V的电源两端．下列分析正确的是（　　）

A．甲的阻值是乙阻值的两倍

B．通过乙的电流比通过甲的电流大

C．甲两端的电压比乙两端电压大

D．乙消耗的电功率比甲的电功率大