下列词语字形全都正确的一项是[ ]
A.绝纶 离乡被井 苍茫 费尽心机
B.静谧 糜使归聘 焦燥 萍飘四方
C.悠藐 悲欢离和 惠赐 繁华酥骨
D.潦倒 概莫能外 筏船 粉身碎骨
答案:D
Dina,()for months to find a job as a waitress, finally took a position at a local advertising agency.
A. struggling
B. struggled
C. having struggled
D. to struggle
贯流式放大机构是怎样工作的,其机构形式有哪几种?