更多"Fibers of hair and wool are not con"的相关试题:
[单项选择]Fibers of hair and wool are not continuous and must normally be spun into thread ______ woven into textile fabrics.
A. as are they
B. when to be
C. that they are
D. if they are to be
[单项选择]The synthetic fibers produced in that large factory account for one third of all the fibers turned out in the area.
A. constitute
B. consist of
C. institute
D. result in
[单项选择]Clothing made of plastic fibers has certain advantages over ______ made of natural fibers like cotton, wool, or silk.
A. one
B. the one
C. that
D. what
[单项选择]Scientists have developed glass fibers as thin as human hair which are designed to carry light signals.
A. 科学家发展出一种玻璃纤维，轻得像人的头发丝一样，可以用来设计轻型的信号装置。
B. 科学家制造出一种玻璃纤维，比人的头发丝还细，这种设计是用来传递光信号的
C. 科学家开发出像人的头发一样细的玻璃纤维来传输光信号。
D. 科学家研制出跟人的头发丝似的玻璃纤维，用在光导信号的设计上。
[单项选择]Magnesium (has little) structural strength and must be (alloyed) with another metals (such as) aluminum and zinc when it is (to be subjected) to stress.
A. has little
B. alloyed
C. such as
D. to be subjected
