It was only after some progress______ in the use and development of electric cur

游客2024-09-24 44

问题 It was only after some progress______ in the use and development of electric current that men began to realize the importance and possibilities of magnetism.

选项 A、was made
B、would have been made
C、has been made
D、had been made

答案 D

解析分析题干可知，本题陈述的是发生在过去的事实，而非虚拟，故排除[B]。由only after…that…“只有…之后，才…”可知，电流的使用和发展上的进步发生在人们意识到磁场的重要性之前，即前一个动作完成之后才会有后一个动作，因而填空处需要使用过去完成时，故答案为[D]。

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It was only after some progress______ in the use and development of electric cur

Thesocialdevelopmentandtechnologicaladvancesarechangingthewaypeopl

Theprocessofthedevelopmentofmodernizationcanbemeasuredbythelevelof

WhatistheprimarypowerofSouthKorea’seconomicprogressintheseyears?[or

The______madeslowbutsureprogressalongthemainstreet.A、procedureB、profess

Withtherapiddevelopmentoftechnology,smartphoneshavesweptthewhole

Collegeisoneofthemostcrucialperiodsinthegrowthanddevelopmentof

Asadevelopingcountry,wemustkeep______withtherapiddevelopmentofthewor

Inthepresenteconomic______wecanmakeevengreaterprogressthanpreviously.A

Themoreyouhurry,______.A、youarelikelytomakelessprogressB、thelessyou

Asadevelopingcountry,wemustkeep______withtherapiddevelopmentofthewo

Mostpeoplehavenoideaofthehardworkandworryaboutgoingintocollect

Anewstudyfindsthatevenmildstresscanaffectyourabilitytocontroly

以下关于终身寿险的说法错误的是()。A.终身寿险的本质特征是无论被保险人

撰写“医家五戒十要”的是A、张仲景 B、孙思邈 C、李时珍 D、张锡纯

就红细胞生成素(EP)而言，下述错误的是（）A.是一种糖蛋白，主要由肾产生，而

患者，女性，48岁。三天前呕血2次，柏油样便3次。面色苍白、四肢发凉，血压60/

等电位作业人员对接地体的距离应不小于：(____)m。（A）66kV;0.6m

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