简述扩大野生植物资源产量的途径。
参考答案:①发展野生植物资源的引种、驯化与栽培。
②在野生植物资源生产中应用生物技术。
③合成、半合成野生植物资源的有用成分。
当某电路有n个节点,m条支路时,用基尔霍夫第一定律可以列出n-1独立的电流方程,()个独立的回路电压方程。
A.m-(n-1)
B.m-n-1
C.m-n
D.m+n+1
I wonder what will become of my daughter. _____ endless homework, she also bears other leading loads such as revision and recitation.
A.With
B. As well as
C.Except
D.Rather than