【单选题】Which of the following has probably been a less important factor contributing to the trend of increasing isolationism in the United States?
A.
terrorist attacks of September 2001
B.
unpopularity of the Iraq War within the American public
C.
protracted involvement of the United States in Afghanistan
D.
worsening economic conditions in the United States since 2007
【简答题】将金纳米材料引入体内靶点后,如恶性肿瘤组织,通过体外近红外光的激发,使金纳米材料周围的温度升高,从而起到杀死肿瘤组织的作用,称为金纳米材料的____治疗。
【单选题】29在起步时,出现“咣当”一声响或响声较杂乱,在缓坡上向后倒车时,出现“嘎巴、嘎巴”的断续声,一般是( )原因。
【判断题】针对当时中国政治制度不民主及社会财富分配不公正的弊端,民盟一大提出了将英美的政治民主与苏联的经济民主结合起来的政治纲领。
【单选题】梁纯弯曲时,梁横截面上产生的应力为( )。
【单选题】梁纯弯曲时,梁横截面上产生的应力为( )
【简答题】Online shopping is increasing dramatically. How could this trend affect our environment and the kinds of jobs required?