为了扩大电流表的量程，可以在电流表上串联一个电阻。
参考答案：错
A．蔗糖的水解产物只有葡萄糖
B．麦芽糖能发生银镜反应
C．蛋白质存在着四级结构
D．DNA主要存在于细胞核
is known to all is that the Diaoyu Islands have belonged to China since ancient times.
A．As
B．It
C．What
D．That
