三河马、三河牛生活的牧区是[ ]
A.新疆牧区
B.内蒙古牧区
C.青海牧区
D.西藏牧区
答案:B
某正三价的金属元素与氧元素形成的化合物中,金属元素的质量分数为70%,此元素的相对原子质量为 _______________。
The old house of this area had to be ______ immediately so that the government could carry its flower-style-city programmer out.
A.torn up
B.torn down
C.torn away
D.torn out