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【单选题】
人在完成举手动作的过程中，起动力和杠杆作用的结构分别是 [ ]
A.
骨和骨骼肌
B.
骨骼肌和关节
C.
骨骼肌和骨
D.
关节和骨
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】在10086999举报渠道中，用户将接收到的彩信直接转发至10086999，再由10086999+扩展码以短信问答的形式收集被举报号码完成举报的举报格式为（ ）。
A.
10086热线举报方式
B.
多次举报方式
C.
一次举报方式
D.
短彩互动举报方式
【单选题】After the stock-market crash of October 1929 it took over three years for America’s government to launch a series of dramatic efforts to end the Depression, starting with Roosevelt’s declaration of a ...
A.
the gradual transformation of shadow banking system
B.
the prosperity of independent investment bank Wall Street relies on
C.
the bankruptcy of Bear Stearns and Merrill Lynch after being swallowed
D.
the conversion of Goldman Sachs and Morgan Stanley to commercial banks