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【单选题】
下面有关材料衰减的叙述,哪句话是错误误的:A.
横波衰减比纵波严重
B.
固体材料的衰减系数一般随温度上升而增大
C.
当晶粒度大于波长1/10时正确探伤有显著影响
D.
提高增益可完全克服衰减正确探伤的影响
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举一反三
【单选题】If the elasticity of demand for peaches is 1.76 and the elasticity of demand for apples is 1.59, then consumers are
A.
more sensitive to a change in the price of peaches than they are to a change in the price of apples.
B.
less sensitive to a change in the price of peaches than they are to a change in the price of apples.
C.
more sensitive to a change in the quantity of peaches than they are to a change in the quantity of apples.
D.
less sensitive to a change in the quantity of peaches than they are to a change in the quantity of apples.
【单选题】I missed what was happening because I wasn’t ______ very closely.
A.
noticing
B.
running
C.
watching
D.
glancing
【单选题】I wasn’t blaming anyone; I said errors like this could be avoided.
A.
merely
B.
mostly
C.
rarely
D.
nearly
【单选题】Which of the following is correct? i. All linear demand curves have a constant slope and a constant price elasticity of demand. ii. The price elasticity of demand changes while moving along a downward...
A.
i only
B.
ii only
C.
iii only
D.
i and ii
E.
i, ii, and iii
【单选题】与巴黎、米兰、伦敦的时装设计师相比,纽约的设计师在设计上更加注重服装的()。
A.
（1）休闲和简约的表现
B.
（2）色彩和图案的运用
C.
（3）优雅和浪漫的风格表达
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