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課程多端同步更新，充分利用零碎時間。做題
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名師大咖面對面，有問有大收獲多。Ninety-one percent of whites, compared with 75 percent of minorities, said they felt their kids would be secure when they went out seeking candy in their area.
Similarly, 93 percent of people earning $50,000 or more said their communities are safe for trick-or-treating, compared with 76 percent of those making less than $25,000.
Nearly two-thirds of the people in the survey said their households will distribute Halloween treats to children who come to call; the likeliest to pass out goodies include younger and higher-earning people.
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