By applying the laser beam, surgeons can perform operations which()
A.may make their patients suffer with negative effects
B.may take their patients a long time to recover
C.do little harm to their patients
D.can only treat eye diseases
A.may make their patients suffer with negative effects
B.may take their patients a long time to recover
C.do little harm to their patients
D.can only treat eye diseases
A、boiled
B、sweltering
C、cold
D、heated
A、踏进我们的家园,就踏进了满世界的光线和宽敞的空间。
B、敞亮家园,欢迎您的光临。
C、踏进我们的家园,您就踏进了一个宽敞明亮的世界。
D、走进我们的家园,投入光明的广阔大地。
A、tensile stress; compressive stress; zero stress
B、compressive stress; tensile stress; maximum normal stress
C、shear stress; normal stress; zero stress
D、normal stress; shear stress; zero stress
A、A. the state of wind, sea and current
B、B. the traffic density
C、C. the presence of the background light at night
D、D. A+B+C
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