The effect of the typhoon named Lingling on Shanghai was much smaller than ________ of Lekima.A.it B.those C.that D.what 答案:【答案】C【解析】考查代词。句意:台风“玲玲”对上海的影响远小于台风“勒金马”的影响。根据句意可知,空格处表达的是前文提到的“effect 影响”的意思,为避免重复,可用代词that特指“effect”。故选C。方程组的解是________.
【解析】,
由①得:y=3-x,
将y=3-x代入②,得2x-(3-x)=-6,
解得x=-1,
所以y=4.
故答案为.