电力网的经济运行应注意：尽量选用高压线路深入（），而且应避免（）。
参考答案：负荷中心；曲折迂回供电
—Your spoken English is better now.
—Thank you. My teacher always asks us________ English as _______ as possible. [ ]
A. to speak; many
B. not to speak; much
C. to speak; much
D. not to speak; more
响誉世界的摄影名作《英国首相丘吉尔》是（）的作品
A.菲利普·哈尔斯曼
B.优素福·卡什
C.阿诺德·纽曼
D.理查德·阿维顿
