正确答案:

题目：负相互作用是有害的。（ ）

解析：×

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举一反三的答案和解析：

[单选题]提示存在心源性水肿的体征，正确的是( )

肝颈静脉回流征阳性

[单选题]Passage FourThree women who secretly buried an 80-year-old woman were put into prison at Birmingham yester day. Two of them, including the dead woman's daughter, kept on collecting her pension (退休金) after her death until their secret was made known to others two years later. The court (法庭) heard that one of the women put on "an Oscar (奥斯卡金奖)—winning performance" by pretending to be the old woman asleep in bed when a social worker called five mouths after Mrs. Townsend's death.

her daughter

解析：

    48．答案为D  此考题为细节题。根据文章前两句Three women who secretly buried an 80-year-old woman...Two of them，including the dead woman's daughter...，就可以断定D正确。

[单选题]头部绕垂直轴开始向右旋转时，眼球震颤的快相指向( )

右侧

[单选题]肺换气的原动力是( )

呼吸肌的舒缩活动

[单选题]Recorded sound effects are used for a_______

all of the above

解析：参见最后一自然段，A、B、C都有提到，所以选D。

[单选题]Passage TwoOnly one animal can walk 200 miles without stopping once to rest. It would take a person two days and two nights to walk this far, and only one man has ever done it without stopping. What amazing animal has such endurance? The camel! The camel is well known for something else, too. It can cross an entire desert without a single drink of water. Its body is built in a special way to help it store water and food.

fat