2. 外语
  3. Magnesium (has little) structural strength and must be (alloyed) with another metals (such as) aluminum and zinc when it is (to

Magnesium (has little) structural strength and must be (alloyed) with another metals (such as) aluminum and zinc when it is (to

admin2004-12-30  47
问题 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.
选项 A、has little
B、alloyed
C、such as
D、to be subjected
答案B
解析
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