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【单选题】
关于癔症．下列何种说法不正确（ ）A.
发病、症状和病情均与患者的病前性格特征有关
B.
发病有明显的心理因素
C.
感觉、运动和意识改变缺乏相应的器质性基础
D.
其症状表现具有做作、夸大、富有情感色彩．可由暗示而诱发或终止
E.
最有效的治疗方法是镇静
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【单选题】A person with myasthenia gravis notes increased muscle strength when he is treated with an acetylcholinesterase (AChE) inhibitor. The basis for his improvement is increased
A.
Amount of acetylcholine (ACh) released from motor nerves
B.
Levels of ACh at the muscle end plates
C.
Number of ACh receptors on the muscle end plates
D.
degradation of ACh at cleft of neuromuscular junction
【单选题】A 42-year-old man with myasthenia gravis notes increased muscle strength when he is treated with an acetylcholinesterase (ACHE) inhibitor. The basis for his improvement is increased
A.
amount of acetylcholine (Ach) released from motor nerves
B.
levels of Ach at the muscle end plates
C.
number of Ach receptors on the muscle end plates
D.
amount of norepinephrine released from motor nerves
E.
synthesis of norepinephrine in motor nerves
【单选题】Contractions called _____ occur whenever the forces applied to a muscle are increased, but the muscle does not appear to be moving.
A.
isotonic
B.
isometric
C.
tetanic
D.
summation contractions
【简答题】题9一19图所示两个相同的圆柱体，质量m=6．35kg，半径r=127mm，绳子连接如图所示。当t=0时将系统由静止释放。 试求： (1)在t=3s时圆柱体B的中心速度； (2)两个圆柱间绳子的拉力。
【单选题】如图9-30所示的MAN-B&W-S-MC/MCE主机操作系统中,管19的信号表示____。
A.
主机启动信号
B.
主机盘车机脱开信号
C.
主机换向完成信号
D.
主机停油控制信号
【判断题】Increased muscle will increase your metabolism, and an increased metabolism means that you can burn more calories and lose more weight even when you are moving.
A.
正确
B.
错误
【简答题】如图9—19所示的导线通电流I，置于一个与磁感应强度为B的均匀磁场垂直的平面上，方向如图。求此导线所受的磁场力的大小与方向。
【简答题】请填空:建立如下图 9-19 所示存储结构所需的说明语句是 _______ 。建立如下图 9-19 所示为变量 a 输入数据的输入语句是 _______ 。建立如下图 9-19 所示存储结构所需的赋值语句是 _______ 。 图 9-19
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