题目

The plants ______well if they_______.   (A) won’t grow, don’t take good care of (B) don’t grow, are taken good care of   (C ) don’t grow, don’t take good care of (D) won’t grow, are not taken good care of 答案：D下列说法不正确的是（ ）A.氢处于第一周期B.氯处于第ⅦA族C.硅与碳处于同一主族D.第三周期元素全部是金属元素