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【单选题】
用劈尖干涉检测工件的表面,当以波长为 λ 的单色光垂直入射时,观察到的干涉条纹如图所示,每一条纹弯曲部分的顶点恰与左邻的直线部分的相切,由图上的条纹可知,工件表面( )A.
．有一凸起， λ /2 ；
B.
．有一凸起， λ /4 ；
C.
．有一凹陷， λ /4 ；
D.
．有一凹陷， λ /2 。
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【简答题】四、动词填空( 5% ) 1. We don’t think he is fit ________ (take ) charge of the company. 2. So far we haven’t found the approach to __________(solve) the problem. 3. Our teacher requires us _________ (not eat...
【单选题】Oil refiners can vary the mix of gasoline versus diesel fuel derived from a barrel of oil. If the price of diesel fuel increases relative to the price of gasoline:
A.
supply of gasoline will shift to the right.
B.
supply of gasoline will shift to the left.
C.
supply of both diesel fuel and gasoline will shift, but in opposite directions.
D.
supply of diesel fuel will shift to the right.
【单选题】交感神经兴奋时,尿量减少的主要原因是
A.
肾小球毛细血管血压下降
B.
肾小球滤过面积减少
C.
肾小球滤过膜通透性降低
D.
血浆胶体渗透压升高
E.
肾小球囊内压升高
【单选题】Suppose that the price elasticity of supply for oil is 0.1. Then, if the price of oil rises by 20 percent, the quantity of oil supplied will increase
A.
by 200 percent.
B.
by 20 percent.
C.
by 2 percent.
D.
by 0.2 percent.
【单选题】George runs a cookie factory. His cookies are made with sugar, peanut oil, and soybean oil. The number of boxes of cookies that he produces is f (su, po, so) = min { su; po + 2so } where su is the num...
A.
127
B.
0
C.
84.67
D.
169.33
【单选题】下列哪项不是强迫性神经症的共同特点
A.
患者意识到这种强迫观念、意向和动作是不必要的，但自己不能控制
B.
患者为这些强迫症状所苦恼和不安
C.
患者可仅有强迫观念或强迫动作
D.
患者可既有强迫观念又有强迫动作
E.
患者自知力丧失
【单选题】下列哪项不是神经症的共同特征?
A.
起病与心理素质、人格特征和社会心理因素均有关
B.
病程多迁延
C.
社会功能可明显受损
D.
自知力存在,有求治要求
E.
症状表现多样,包括精神病性症状
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