城市森林，是指在城市及其周邊範圍內以喬木為主體，達到一定的規模（面積應大於0.5hm2，hm表示百米）和覆蓋度（林木樹冠覆蓋度應在10%～30%），能對周圍的環境產生重要影響，並具有明顯的生態價值和人文景觀價值等的各種生物和非生物的綜合體。
根據上述定義，下列不屬於城市森林的是（ ）
賈女士：本報對減肥成功者所作的一項調查顯示。70％的受調查者稱服用東參減肥丸，30％的稱服用靈芝瘦身丹。沒有被調查者服用其它減肥藥。
陳先生：這說明在被調查者中，服用東參減肥丸的人數，比服用靈芝瘦身丹的兩倍還多。
賈女士：另外，25％的被調查者稱他們從不通過藥物減肥。
以下哪項如果為真，最有利於解釋賈女土的斷定中看來存在的矛盾?
【專題 GMAT邏輯題】
The higher the level of certainvitamins and minerals in the bloodstream, the better a person's lung function, asmeasured by the amount of air the person can expel in one second. The lung functionof smokers is significantly worse, on average, than that of nonsmokers. Clearly,therefore, one way for smokers to improve their lung function is for them to increasetheir intake of foods that are rich in these helpful vitamins and minerals. Which of the following is an assumption on whichthis argument depends?
(A) Smokers are less likely than nonsmokers to have diets thatare rich in vitamins and minerals.
(B) The lung function of smokers whose diets are rich in thosevitamins and minerals is generally better than that of nonsmokers with comparablediets.
(C) People whose diets are deficient in those vitamins and mineralsdo not typically have other health problems in addition to diminished lung function.
(D) Stopping smoking will not typically improve lung functionmore than any diet changes can.
(E) Smoking does not introduce into the body chemicals thatprevent the helpful vitamins and minerals from entering the bloodstream.
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