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

游客2024-09-24 50

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

Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforreg

AccordingtoJanet,thefactorthatwouldmostaffectnegotiationsis[br][ori

HowGirlsCanWininMathandScience?A)Mathisacumulativesubject,u

党的（）是党的根本性建设，决定党的建设方向和效果。A.思想建设 B.政治

一大面积烧伤患者，近日来常寒战、高热，呈间歇热，四肢厥冷，发绀，尿量明显减少，很

患者男，28岁，主诉4d未解大便，伴头痛、腹痛、腹胀、乏力，触诊腹部较紧张，肛诊

密陀僧不能配用的是A．朴硝 B．砒霜 C．狼毒 D．巴豆 E．丁香

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接地电阻测量仪测量时，接于电流极的是（ ）。A.E B.P C.C D.G

接地电阻测量仪测量时，接于电流极的是（　）。A.E B.P C.C D.G