更多"A laser beam is used to ______even "的相关试题:
[单项选择]A laser beam is used to ______even the hardest substance.
A. light up
B. repair
C. identify
D. penetrate
[单项选择]Advertising was __________ never used, even in the early 1970s when the use of search by companies was much less widespread.
A. precisely
B. progressively
C. practically
D. presumably
[单项选择]If used ______, even the most poorly designed cell phone should be able to function for at least three years.
A. continuously
B. sparingly
C. fortunately
D. uncertainly
[单项选择]A beam of light will not bend round comers unless made to do so with the help of a reflecting device.
A. 除非有反射装置的帮助，使得光线在拐弯处弯曲，否则光线是不会弯曲的。
B. 光线在拐弯处将不会弯曲，除非在反射装置的帮助下使它弯曲。
C. 如果不用反射装置使光线弯曲的话，光线在拐弯处是不会弯曲的。
D. 即使有反射装置的帮助，光线在拐弯处也不会弯曲。
[单项选择]By moving the radar beam around slowly in circles, we can ______ the surroundings.
A. explore
B. expose
C. exploit
D. expand
[单项选择]下面被调用函数sub的函数值的类型是 ( )
sub(float
A. 双精度型
B. 空类型
C. 整型
