(Cigarette smock) has been shown to contain numerous compounds that (are known t

游客2025-05-10 28

问题 (Cigarette smock) has been shown to contain numerous compounds that (are known to) cause cancer in experimental animals and (they) appear, to be strongly (linked to) human cancer, especially cancer of the lung.

选项 A、Cigarette smock
B、are known to
C、they
D、linked

答案 C改为it

解析指代前面的单数名词cigarette smoke。

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(Cigarette smock) has been shown to contain numerous compounds that (are known t

Notice①Briefcasecontainingdocumentsandkeys

Somepeoplethinkit’s______tosmokewithacigaretteholder,A、flexibleB、soph

Manypeoplethinkofdesertsas______regions,butnumerousspeciesofplantsa

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TheEnglishlanguagecontainsa(n)______ofwordswhicharecomparativelyseldo

Thebookcontainedalarge______ofinformation.A、dealB、amountC、numberD、sum

Cigarettesmokingisagreathealth______andmayleadtofataldiseases.A、oppo

Cigarettesmokingisamajorhealth______andmayresultinyourdeath.A、hazard

Theitemscontainedintheparceldon’tcorrespond______thoseonthelistthat

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