皮皮学，免费搜题
登录
搜题
【单选题】
有两个同样的木块,从同高度自由下落,在下落中,其中一木块被水平飞来的子弹击中,并使子弹陷于其中,子弹的质量不能忽略,不计空气阻力,则A.
两木块同时到达地面
B.
被击木块先到达地面
C.
被击木块后到达地面
D.
条件不足，无法确定它们到达地面的先后
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】- How was the performance last night? - It was so good. Though it ＿＿＿＿＿＿ nearly four hours, few people left early.
A.
covered
B.
reached
C.
lasted
D.
played
【简答题】中国人喜欢山、热爱山、敬仰山,因此在山当中又区分出岳,以示不同,古代中国有五岳:东岳( )、南岳( )、西岳( )、北岳( )、中岳( )。
【单选题】Too much ______ can possibly lead to unhappiness, even to thoughts of suicide as few people have the courage to analyze themselves objectively and minutely.
A.
retrospect
B.
introspection
C.
perspicacity
D.
perspicuity
【单选题】(2013·西安一中月考)As ________ unemployment is very high at the moment，it's very difficult for people to find ________ work.
A.
the；/
B.
/；/
C.
the；a
D.
an；the
【单选题】The passage seems to indicate that the United States is a country where ______.
A.
few people are indifferent to high imaginative art
B.
handicrafts and decoration work lack artistic quality
C.
handicraftsmen find it difficult to live a decent life
D.
most artists seem to indulge in fancy day-dreaming
【单选题】人突然受到寒冷刺激时，引起骨骼肌收缩而打起寒颤。下列关于该反射的叙述，错误的是 [ ]
A.
该反射弧的效应器是骨骼肌
B.
该反射弧的感受器主要分布在身体的皮肤中
C.
该反射弧的神经中枢应包括大脑皮层、下丘脑和垂体
D.
寒冷刺激以电和化学信号的形式在反射弧中传导和传递
相关题目：